diff --git a/README.md b/README.md
index 73488544c..48336d5d2 100644
--- a/README.md
+++ b/README.md
@@ -55,20 +55,9 @@ Installer le bon vieux `pyExcelerator` dans l'environnement:
 ## Migration ZScolar
 
 ### Méthodes qui ne devraient plus être publiées:
-security.declareProtected(ScoView, "get_preferences")
-
-def get_preferences(context, formsemestre_id=None):
-    "Get preferences for this instance (a dict-like instance)"
-    return sco_preferences.sem_preferences(context, formsemestre_id)
-
-security.declareProtected(ScoView, "get_preference")
-
-def get_preference(context, name, formsemestre_id=None):
-    """Returns value of named preference.
-    All preferences have a sensible default value (see sco_preferences.py),
-    this function always returns a usable value for all defined preferences names.
-    """
-    return sco_preferences.get_base_preferences(context).get(formsemestre_id, name)
+
+
+
 
 
 
diff --git a/app/scodoc/ImportScolars.py b/app/scodoc/ImportScolars.py
index 1935701f1..701ede72c 100644
--- a/app/scodoc/ImportScolars.py
+++ b/app/scodoc/ImportScolars.py
@@ -240,7 +240,9 @@ def students_import_excel(
             dest = "formsemestre_status?formsemestre_id=%s" % formsemestre_id
         else:
             dest = context.NotesURL()
-        H = [html_sco_header.sco_header(context, REQUEST, page_title="Import etudiants")]
+        H = [
+            html_sco_header.sco_header(context, REQUEST, page_title="Import etudiants")
+        ]
         H.append("<ul>")
         for d in diag:
             H.append("<li>%s</li>" % d)
@@ -266,7 +268,7 @@ def scolars_import_excel_file(
     cnx = context.GetDBConnexion(autocommit=False)
     cursor = cnx.cursor(cursor_factory=ndb.ScoDocCursor)
     annee_courante = time.localtime()[0]
-    always_require_ine = context.get_preference("always_require_ine")
+    always_require_ine = sco_preferences.get_preference(context, "always_require_ine")
     exceldata = datafile.read()
     if not exceldata:
         raise ScoValueError("Ficher excel vide ou invalide")
@@ -789,6 +791,8 @@ def adm_table_description_format(context):
         rows=Fmt.values(),
         html_sortable=True,
         html_class="table_leftalign",
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     return tab
diff --git a/app/scodoc/html_sidebar.py b/app/scodoc/html_sidebar.py
index 7afdcf5cf..67c1a3412 100644
--- a/app/scodoc/html_sidebar.py
+++ b/app/scodoc/html_sidebar.py
@@ -129,7 +129,7 @@ def sidebar(context, REQUEST=None):
 """
                 % params
             )
-            if context.get_preference("handle_billets_abs"):
+            if sco_preferences.get_preference(context, "handle_billets_abs"):
                 H.append(
                     """<li>     <a href="%(ScoURL)s/Absences/listeBilletsEtud?etudid=%(etudid)s">Billets</a></li>"""
                     % params
@@ -166,9 +166,9 @@ def sidebar_dept(context, REQUEST=None):
     """Partie supérieure de la marge de gauche"""
     infos = {
         "BASE0": REQUEST.BASE0,
-        "DeptIntranetTitle": context.get_preference("DeptIntranetTitle"),
-        "DeptIntranetURL": context.get_preference("DeptIntranetURL"),
-        "DeptName": context.get_preference("DeptName"),
+        "DeptIntranetTitle": sco_preferences.get_preference(context, "DeptIntranetTitle"),
+        "DeptIntranetURL": sco_preferences.get_preference(context, "DeptIntranetURL"),
+        "DeptName": sco_preferences.get_preference(context, "DeptName"),
         "ScoURL": context.ScoURL(),
     }
 
diff --git a/app/scodoc/notes_log.py b/app/scodoc/notes_log.py
index 9d1ba7c2b..0cbbb92e1 100644
--- a/app/scodoc/notes_log.py
+++ b/app/scodoc/notes_log.py
@@ -117,7 +117,7 @@ def sendAlarm(context, subj, txt):
     msg = MIMEMultipart()
     subj = Header(subj, sco_utils.SCO_ENCODING)
     msg["Subject"] = subj
-    msg["From"] = context.get_preference("email_from_addr")
+    msg["From"] = sco_preferences.get_preference(context, "email_from_addr")
     msg["To"] = ALARM_DESTINATION
     msg.epilogue = ""
     txt = MIMEText(txt, "plain", sco_utils.SCO_ENCODING)
diff --git a/app/scodoc/notes_table.py b/app/scodoc/notes_table.py
index e72765583..1eadd2db5 100644
--- a/app/scodoc/notes_table.py
+++ b/app/scodoc/notes_table.py
@@ -173,7 +173,7 @@ class NotesTable:
         self.moduleimpl_stats = {}  # { moduleimpl_id : {stats} }
         self._uecoef = {}  # { ue_id : coef } cache coef manuels ue cap
         self._evaluations_etats = None  # liste des evaluations avec état
-        self.use_ue_coefs = context.get_preference("use_ue_coefs", formsemestre_id)
+        self.use_ue_coefs = sco_preferences.get_preference(context, "use_ue_coefs", formsemestre_id)
         # Infos sur les etudiants
         self.inscrlist = context.do_formsemestre_inscription_list(
             args={"formsemestre_id": formsemestre_id}
diff --git a/app/scodoc/pe_avislatex.py b/app/scodoc/pe_avislatex.py
index 3723530b0..2da84ec70 100644
--- a/app/scodoc/pe_avislatex.py
+++ b/app/scodoc/pe_avislatex.py
@@ -71,7 +71,7 @@ def get_code_latex_from_scodoc_preference(
     Extrait le template (ou le tag d'annotation au regard du champ fourni) des préférences LaTeX
     et s'assure qu'il est renvoyé au format unicode
     """
-    template_latex = context.get_preference(champ, formsemestre_id)
+    template_latex = sco_preferences.get_preference(context, champ, formsemestre_id)
     # Conversion du template en unicode:
     if template_latex:
         template_latex = template_latex.decode(scu.SCO_ENCODING)
@@ -235,7 +235,7 @@ def get_code_latex_avis_etudiant(
 def get_annotation_PE(context, etudid, tag_annotation_pe):
     """Renvoie l'annotation PE dans la liste de ces annotations ;
     Cette annotation est reconnue par la présence d'un tag **PE**
-    (cf. context.get_preferences -> pe_tag_annotation_avis_latex).
+    (cf. .get_preferences -> pe_tag_annotation_avis_latex).
 
     Result: chaine unicode
     """
diff --git a/app/scodoc/pe_view.py b/app/scodoc/pe_view.py
index ad59460be..dc0902612 100644
--- a/app/scodoc/pe_view.py
+++ b/app/scodoc/pe_view.py
@@ -54,7 +54,9 @@ import pe_avislatex
 
 def _pe_view_sem_recap_form(context, formsemestre_id, REQUEST=None):
     H = [
-        html_sco_header.sco_header(context, REQUEST, page_title="Avis de poursuite d'études"),
+        html_sco_header.sco_header(
+            context, REQUEST, page_title="Avis de poursuite d'études"
+        ),
         """<h2 class="formsemestre">Génération des avis de poursuites d'études</h2>
         <p class="help">
         Cette fonction génère un ensemble de fichiers permettant d'éditer des avis de poursuites d'études.
@@ -95,7 +97,7 @@ def pe_view_sem_recap(
     """
     if REQUEST and REQUEST.method == "GET":
         return _pe_view_sem_recap_form(context, formsemestre_id, REQUEST=REQUEST)
-    prefs = context.get_preferences(formsemestre_id=formsemestre_id)
+    prefs = sco_preferences.SemPreferences(context, formsemestre_id=formsemestre_id)
 
     semBase = sco_formsemestre.get_formsemestre(context, formsemestre_id)
 
diff --git a/app/scodoc/sco_abs.py b/app/scodoc/sco_abs.py
index 21538e677..415101eab 100644
--- a/app/scodoc/sco_abs.py
+++ b/app/scodoc/sco_abs.py
@@ -45,7 +45,7 @@ import sco_compute_moy
 
 def is_work_saturday(context):
     "Vrai si le samedi est travaillé"
-    return int(context.get_preference("work_saturday"))
+    return int(sco_preferences.get_preference(context, "work_saturday"))
 
 
 def MonthNbDays(month, year):
diff --git a/app/scodoc/sco_abs_notification.py b/app/scodoc/sco_abs_notification.py
index a163dc974..5433d0bb6 100644
--- a/app/scodoc/sco_abs_notification.py
+++ b/app/scodoc/sco_abs_notification.py
@@ -71,7 +71,9 @@ def do_abs_notify(context, sem, etudid, date, nbabs, nbabsjust):
         formsemestre_id = sem["formsemestre_id"]
     else:
         formsemestre_id = None
-    prefs = context.get_preferences(formsemestre_id=sem["formsemestre_id"])
+    prefs = sco_preferences.SemPreferences(
+        context, formsemestre_id=sem["formsemestre_id"]
+    )
 
     destinations = abs_notify_get_destinations(
         context, sem, prefs, etudid, date, nbabs, nbabsjust
@@ -81,7 +83,7 @@ def do_abs_notify(context, sem, etudid, date, nbabs, nbabsjust):
         return  # abort
 
     # Vérification fréquence (pour ne pas envoyer de mails trop souvent)
-    abs_notify_max_freq = context.get_preference("abs_notify_max_freq")
+    abs_notify_max_freq = sco_preferences.get_preference(context, "abs_notify_max_freq")
     destinations_filtered = []
     for email_addr in destinations:
         nbdays_since_last_notif = user_nbdays_since_last_notif(
@@ -179,10 +181,10 @@ def abs_notify_is_above_threshold(context, etudid, nbabs, nbabsjust, formsemestr
     (nbabs > abs_notify_abs_threshold)
     (nbabs - nbabs_last_notified) > abs_notify_abs_increment
     """
-    abs_notify_abs_threshold = context.get_preference(
+    abs_notify_abs_threshold = sco_preferences.get_preference(context, 
         "abs_notify_abs_threshold", formsemestre_id
     )
-    abs_notify_abs_increment = context.get_preference(
+    abs_notify_abs_increment = sco_preferences.get_preference(context, 
         "abs_notify_abs_increment", formsemestre_id
     )
     nbabs_last_notified = etud_nbabs_last_notified(context, etudid, formsemestre_id)
diff --git a/app/scodoc/sco_abs_views.py b/app/scodoc/sco_abs_views.py
index 95b1677d9..cc38fc80b 100644
--- a/app/scodoc/sco_abs_views.py
+++ b/app/scodoc/sco_abs_views.py
@@ -116,8 +116,10 @@ def doSignaleAbsence(
                 if modimpl["moduleimpl_id"] == moduleimpl_id:
                     M = "dans le module %s" % modimpl["module"]["code"]
     H = [
-        html_sco_header.sco_header(context, 
-            REQUEST, page_title="Signalement d'une absence pour %(nomprenom)s" % etud
+        html_sco_header.sco_header(
+            context,
+            REQUEST,
+            page_title="Signalement d'une absence pour %(nomprenom)s" % etud,
         ),
         """<h2>Signalement d'absences</h2>""",
     ]
@@ -151,7 +153,7 @@ def SignaleAbsenceEtud(context, REQUEST=None):  # etudid implied
     etudid = etud["etudid"]
     disabled = False
     if not etud["cursem"]:
-        require_module = context.get_preference(
+        require_module = sco_preferences.get_preference(context, 
             "abs_require_module"
         )  # on utilise la pref globale car pas de sem courant
         if require_module:
@@ -162,7 +164,7 @@ def SignaleAbsenceEtud(context, REQUEST=None):  # etudid implied
             menu_module = ""
     else:
         formsemestre_id = etud["cursem"]["formsemestre_id"]
-        require_module = context.get_preference("abs_require_module", formsemestre_id)
+        require_module = sco_preferences.get_preference(context, "abs_require_module", formsemestre_id)
         nt = context.Notes._getNotesCache().get_NotesTable(
             context.Notes, formsemestre_id
         )
@@ -203,8 +205,10 @@ def SignaleAbsenceEtud(context, REQUEST=None):  # etudid implied
         menu_module += """</select></p>"""
 
     H = [
-        html_sco_header.sco_header(context, 
-            REQUEST, page_title="Signalement d'une absence pour %(nomprenom)s" % etud
+        html_sco_header.sco_header(
+            context,
+            REQUEST,
+            page_title="Signalement d'une absence pour %(nomprenom)s" % etud,
         ),
         """<table><tr><td>
           <h2>Signalement d'une absence pour %(nomprenom)s</h2>
@@ -316,8 +320,10 @@ def doJustifAbsence(
             nbadded += 1
     #
     H = [
-        html_sco_header.sco_header(context, 
-            REQUEST, page_title="Justification d'une absence pour %(nomprenom)s" % etud
+        html_sco_header.sco_header(
+            context,
+            REQUEST,
+            page_title="Justification d'une absence pour %(nomprenom)s" % etud,
         ),
         """<h2>Justification d'absences</h2>""",
     ]
@@ -352,8 +358,10 @@ def JustifAbsenceEtud(context, REQUEST=None):  # etudid implied
     etud = context.getEtudInfo(filled=1, REQUEST=REQUEST)[0]
     etudid = etud["etudid"]
     H = [
-        html_sco_header.sco_header(context, 
-            REQUEST, page_title="Justification d'une absence pour %(nomprenom)s" % etud
+        html_sco_header.sco_header(
+            context,
+            REQUEST,
+            page_title="Justification d'une absence pour %(nomprenom)s" % etud,
         ),
         """<table><tr><td>
           <h2>Justification d'une absence pour %(nomprenom)s</h2>
@@ -421,8 +429,10 @@ def doAnnuleAbsence(
             nbadded += 1
     #
     H = [
-        html_sco_header.sco_header(context, 
-            REQUEST, page_title="Annulation d'une absence pour %(nomprenom)s" % etud
+        html_sco_header.sco_header(
+            context,
+            REQUEST,
+            page_title="Annulation d'une absence pour %(nomprenom)s" % etud,
         ),
         """<h2>Annulation d'absences pour %(nomprenom)s</h2>""" % etud,
     ]
@@ -458,8 +468,10 @@ def AnnuleAbsenceEtud(context, REQUEST=None):  # etudid implied
     etudid = etud["etudid"]
 
     H = [
-        html_sco_header.sco_header(context, 
-            REQUEST, page_title="Annulation d'une absence pour %(nomprenom)s" % etud
+        html_sco_header.sco_header(
+            context,
+            REQUEST,
+            page_title="Annulation d'une absence pour %(nomprenom)s" % etud,
         ),
         """<table><tr><td>
           <h2><font color="#FF0000">Annulation</font> d'une absence pour %(nomprenom)s</h2>
@@ -557,7 +569,8 @@ def doAnnuleJustif(
             nbadded += 1
     #
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title="Annulation d'une justification pour %(nomprenom)s" % etud,
         ),
@@ -672,7 +685,8 @@ def CalAbs(context, REQUEST=None):  # etud implied
 
     #
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title="Calendrier des absences de %(nomprenom)s" % etud,
             cssstyles=["css/calabs.css"],
@@ -752,7 +766,9 @@ def ListeAbsEtud(
         base_url=base_url_nj,
         filename="abs_" + scu.make_filename(etud["nomprenom"]),
         caption="Absences non justifiées de %(nomprenom)s" % etud,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     tab_absjust = GenTable(
         titles=titles,
@@ -763,7 +779,9 @@ def ListeAbsEtud(
         base_url=base_url_j,
         filename="absjust_" + scu.make_filename(etud["nomprenom"]),
         caption="Absences justifiées de %(nomprenom)s" % etud,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
 
     # Formats non HTML et demande d'une seule table:
@@ -777,7 +795,9 @@ def ListeAbsEtud(
         # Mise en forme HTML:
         H = []
         H.append(
-            html_sco_header.sco_header(context, REQUEST, page_title="Absences de %s" % etud["nomprenom"])
+            html_sco_header.sco_header(
+                context, REQUEST, page_title="Absences de %s" % etud["nomprenom"]
+            )
         )
         H.append(
             """<h2>Absences de %s (à partir du %s)</h2>"""
@@ -828,7 +848,8 @@ def absences_index_html(context, REQUEST=None):
     authuser = REQUEST.AUTHENTICATED_USER
 
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title="Gestion des absences",
             cssstyles=["css/calabs.css"],
@@ -844,7 +865,7 @@ def absences_index_html(context, REQUEST=None):
         H.append(
             """<ul><li><a href="EtatAbsences">Afficher l'état des absences (pour tout un groupe)</a></li>"""
         )
-        if context.get_preference("handle_billets_abs"):
+        if sco_preferences.get_preference(context, "handle_billets_abs"):
             H.append(
                 """<li><a href="listeBillets">Traitement des billets d'absence en attente</a></li>"""
             )
diff --git a/app/scodoc/sco_apogee_compare.py b/app/scodoc/sco_apogee_compare.py
index f2f76c540..acfb3408f 100644
--- a/app/scodoc/sco_apogee_compare.py
+++ b/app/scodoc/sco_apogee_compare.py
@@ -65,7 +65,9 @@ _help_txt = """
 def apo_compare_csv_form(context, REQUEST=None):
     """Form: submit 2 CSV files to compare them."""
     H = [
-        html_sco_header.sco_header(context, REQUEST, page_title="Comparaison de fichiers Apogée"),
+        html_sco_header.sco_header(
+            context, REQUEST, page_title="Comparaison de fichiers Apogée"
+        ),
         """<h2>Comparaison de fichiers Apogée</h2>
         <form id="apo_csv_add" action="apo_compare_csv" method="post" enctype="multipart/form-data">
         """,
@@ -95,7 +97,9 @@ def apo_compare_csv(context, A_file, B_file, autodetect=True, REQUEST=None):
     B = _load_apo_data(B_file, autodetect=autodetect)
 
     H = [
-        html_sco_header.sco_header(context, REQUEST, page_title="Comparaison de fichiers Apogée"),
+        html_sco_header.sco_header(
+            context, REQUEST, page_title="Comparaison de fichiers Apogée"
+        ),
         "<h2>Comparaison de fichiers Apogée</h2>",
         _help_txt,
         '<div class="apo_compare_csv">',
@@ -263,7 +267,9 @@ def apo_table_compare_etud_results(context, A, B, REQUEST=None):
         columns_ids=("nip", "nom", "prenom", "elt_code", "type_res", "val_A", "val_B"),
         html_class="table_leftalign",
         html_with_td_classes=True,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     return T
 
diff --git a/app/scodoc/sco_bulletins.py b/app/scodoc/sco_bulletins.py
index e41d0cbc0..a9dfa74a0 100644
--- a/app/scodoc/sco_bulletins.py
+++ b/app/scodoc/sco_bulletins.py
@@ -85,7 +85,7 @@ def make_context_dict(context, sem, etud):
     C.update(etud)
     # copie preferences
     for name in sco_preferences.PREFS_NAMES:
-        C[name] = context.get_preference(name, sem["formsemestre_id"])
+        C[name] = sco_preferences.get_preference(context, name, sem["formsemestre_id"])
 
     # ajoute groupes et group_0, group_1, ...
     sco_groups.etud_add_group_infos(context, etud, sem)
@@ -116,7 +116,7 @@ def formsemestre_bulletinetud_dict(
     if not version in ("short", "long", "selectedevals"):
         raise ValueError("invalid version code !")
 
-    prefs = context.get_preferences(formsemestre_id)
+    prefs = sco_preferences.SemPreferences(context, formsemestre_id)
     nt = context._getNotesCache().get_NotesTable(
         context, formsemestre_id
     )  # > toutes notes
@@ -403,8 +403,8 @@ def _ue_mod_bulletin(context, etudid, formsemestre_id, ue_id, modimpls, nt, vers
     (ajoute les informations aux modimpls)
     Result: liste de modules de l'UE avec les infos dans chacun (seulement ceux où l'étudiant est inscrit).
     """
-    bul_show_mod_rangs = context.get_preference("bul_show_mod_rangs", formsemestre_id)
-    bul_show_abs_modules = context.get_preference(
+    bul_show_mod_rangs = sco_preferences.get_preference(context, "bul_show_mod_rangs", formsemestre_id)
+    bul_show_abs_modules = sco_preferences.get_preference(context, 
         "bul_show_abs_modules", formsemestre_id
     )
     if bul_show_abs_modules:
@@ -478,7 +478,7 @@ def _ue_mod_bulletin(context, etudid, formsemestre_id, ue_id, modimpls, nt, vers
                 '<a class="bull_link" href="moduleimpl_status?moduleimpl_id=%s" title="%s">'
                 % (modimpl["moduleimpl_id"], mod["mod_descr_txt"])
             )
-            if context.get_preference("bul_show_codemodules", formsemestre_id):
+            if sco_preferences.get_preference(context, "bul_show_codemodules", formsemestre_id):
                 mod["code"] = modimpl["module"]["code"]
                 mod["code_html"] = link_mod + mod["code"] + "</a>"
             else:
@@ -497,7 +497,7 @@ def _ue_mod_bulletin(context, etudid, formsemestre_id, ue_id, modimpls, nt, vers
                 '<a class="bull_link" href="moduleimpl_status?moduleimpl_id=%s" title="%s">'
                 % (modimpl["moduleimpl_id"], mod_descr)
             )
-            if context.get_preference("bul_show_codemodules", formsemestre_id):
+            if sco_preferences.get_preference(context, "bul_show_codemodules", formsemestre_id):
                 mod["code_txt"] = modimpl["module"]["code"]
                 mod["code_html"] = link_mod + mod["code_txt"] + "</a>"
             else:
@@ -558,7 +558,7 @@ def _ue_mod_bulletin(context, etudid, formsemestre_id, ue_id, modimpls, nt, vers
 
             # Evaluations incomplètes ou futures:
             mod["evaluations_incompletes"] = []
-            if context.get_preference("bul_show_all_evals", formsemestre_id):
+            if sco_preferences.get_preference(context, "bul_show_all_evals", formsemestre_id):
                 complete_eval_ids = set([e["evaluation_id"] for e in evals])
                 all_evals = context.do_evaluation_list(
                     args={"moduleimpl_id": modimpl["moduleimpl_id"]}
@@ -842,7 +842,7 @@ def can_send_bulletin_by_mail(context, formsemestre_id, REQUEST):
     authuser = REQUEST.AUTHENTICATED_USER
     sem = sco_formsemestre.get_formsemestre(context, formsemestre_id)
     return (
-        context.get_preference("bul_mail_allowed_for_all", formsemestre_id)
+        sco_preferences.get_preference(context, "bul_mail_allowed_for_all", formsemestre_id)
         or authuser.has_permission(Permission.ScoImplement, context)
         or str(authuser) in sem["responsables"]
     )
@@ -971,10 +971,10 @@ def mail_bulletin(context, formsemestre_id, I, pdfdata, filename, recipient_addr
     If bul_mail_list_abs pref is true, put list of absences in mail body (text).
     """
     etud = I["etud"]
-    webmaster = context.get_preference("bul_mail_contact_addr", formsemestre_id)
-    dept = scu.unescape_html(context.get_preference("DeptName", formsemestre_id))
-    copy_addr = context.get_preference("email_copy_bulletins", formsemestre_id)
-    intro_mail = context.get_preference("bul_intro_mail", formsemestre_id)
+    webmaster = sco_preferences.get_preference(context, "bul_mail_contact_addr", formsemestre_id)
+    dept = scu.unescape_html(sco_preferences.get_preference(context, "DeptName", formsemestre_id))
+    copy_addr = sco_preferences.get_preference(context, "email_copy_bulletins", formsemestre_id)
+    intro_mail = sco_preferences.get_preference(context, "bul_intro_mail", formsemestre_id)
 
     if intro_mail:
         hea = intro_mail % {
@@ -985,7 +985,7 @@ def mail_bulletin(context, formsemestre_id, I, pdfdata, filename, recipient_addr
     else:
         hea = ""
 
-    if context.get_preference("bul_mail_list_abs"):
+    if sco_preferences.get_preference(context, "bul_mail_list_abs"):
         hea += "\n\n" + sco_abs_views.ListeAbsEtud(
             context, etud["etudid"], with_evals=False, format="text"
         )
@@ -994,7 +994,7 @@ def mail_bulletin(context, formsemestre_id, I, pdfdata, filename, recipient_addr
     subj = Header("Relevé de notes de %s" % etud["nomprenom"], scu.SCO_ENCODING)
     recipients = [recipient_addr]
     msg["Subject"] = subj
-    msg["From"] = context.get_preference("email_from_addr", formsemestre_id)
+    msg["From"] = sco_preferences.get_preference(context, "email_from_addr", formsemestre_id)
     msg["To"] = " ,".join(recipients)
     if copy_addr:
         msg["Bcc"] = copy_addr.strip()
@@ -1027,7 +1027,8 @@ def _formsemestre_bulletinetud_header_html(
     authuser = REQUEST.AUTHENTICATED_USER
     uid = str(authuser)
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             page_title="Bulletin de %(nomprenom)s" % etud,
             REQUEST=REQUEST,
             javascripts=[
diff --git a/app/scodoc/sco_bulletins_generator.py b/app/scodoc/sco_bulletins_generator.py
index 691059746..1d91697af 100644
--- a/app/scodoc/sco_bulletins_generator.py
+++ b/app/scodoc/sco_bulletins_generator.py
@@ -87,7 +87,7 @@ def bulletin_get_class(class_name):
 
 def bulletin_get_class_name_displayed(context, formsemestre_id):
     """Le nom du générateur utilisé, en clair"""
-    bul_class_name = context.get_preference("bul_class_name", formsemestre_id)
+    bul_class_name = sco_preferences.get_preference(context, "bul_class_name", formsemestre_id)
     try:
         gen_class = bulletin_get_class(bul_class_name)
         return gen_class.description
@@ -121,7 +121,7 @@ class BulletinGenerator:
         self.server_name = server_name
         # Store preferences for convenience:
         formsemestre_id = self.infos["formsemestre_id"]
-        self.preferences = context.get_preferences(formsemestre_id)
+        self.preferences = sco_preferences.SemPreferences(context, formsemestre_id)
         self.diagnostic = None  # error message if any problem
         # Common PDF styles:
         #  - Pour tous les champs du bulletin sauf les cellules de table:
@@ -223,7 +223,9 @@ class BulletinGenerator:
                     margins=self.margins,
                     server_name=self.server_name,
                     filigranne=self.filigranne,
-                    preferences=self.context.get_preferences(formsemestre_id),
+                    preferences=self.sco_preferences.SemPreferences(
+                        context, formsemestre_id
+                    ),
                 )
             )
             document.build(objects)
@@ -273,7 +275,7 @@ def make_formsemestre_bulletinetud(
         raise ValueError("invalid version code !")
 
     formsemestre_id = infos["formsemestre_id"]
-    bul_class_name = context.get_preference("bul_class_name", formsemestre_id)
+    bul_class_name = sco_preferences.get_preference(context, "bul_class_name", formsemestre_id)
     try:
         gen_class = bulletin_get_class(bul_class_name)
     except:
diff --git a/app/scodoc/sco_bulletins_json.py b/app/scodoc/sco_bulletins_json.py
index 156e5264f..360150c89 100644
--- a/app/scodoc/sco_bulletins_json.py
+++ b/app/scodoc/sco_bulletins_json.py
@@ -156,7 +156,7 @@ def formsemestre_bulletinetud_published_dict(
     mg = scu.fmt_note(nt.get_etud_moy_gen(etudid))
     if (
         nt.get_moduleimpls_attente()
-        or context.get_preference("bul_show_rangs", formsemestre_id) == 0
+        or sco_preferences.get_preference(context, "bul_show_rangs", formsemestre_id) == 0
     ):
         # n'affiche pas le rang sur le bulletin s'il y a des
         # notes en attente dans ce semestre
@@ -249,7 +249,7 @@ def formsemestre_bulletinetud_published_dict(
                 m["note"][k] = scu.fmt_note(m["note"][k])
 
             u["module"].append(m)
-            if context.get_preference("bul_show_mod_rangs", formsemestre_id):
+            if sco_preferences.get_preference(context, "bul_show_mod_rangs", formsemestre_id):
                 m["rang"] = dict(
                     value=nt.mod_rangs[modimpl["moduleimpl_id"]][0][etudid]
                 )
@@ -283,7 +283,7 @@ def formsemestre_bulletinetud_published_dict(
                         )
                 # Evaluations incomplètes ou futures:
                 complete_eval_ids = set([e["evaluation_id"] for e in evals])
-                if context.get_preference("bul_show_all_evals", formsemestre_id):
+                if sco_preferences.get_preference(context, "bul_show_all_evals", formsemestre_id):
                     all_evals = context.do_evaluation_list(
                         args={"moduleimpl_id": modimpl["moduleimpl_id"]}
                     )
@@ -327,7 +327,7 @@ def formsemestre_bulletinetud_published_dict(
             )
 
     # --- Absences
-    if context.get_preference("bul_show_abs", formsemestre_id):
+    if sco_preferences.get_preference(context, "bul_show_abs", formsemestre_id):
         AbsEtudSem = sco_abs.getAbsSemEtud(context, sem, etudid)
         nbabs = AbsEtudSem.CountAbs()
         nbabsjust = AbsEtudSem.CountAbsJust()
@@ -336,7 +336,7 @@ def formsemestre_bulletinetud_published_dict(
 
     # --- Decision Jury
     if (
-        context.get_preference("bul_show_decision", formsemestre_id)
+        sco_preferences.get_preference(context, "bul_show_decision", formsemestre_id)
         or xml_with_decisions
     ):
         infos, dpv = sco_bulletins.etud_descr_situation_semestre(
@@ -344,7 +344,7 @@ def formsemestre_bulletinetud_published_dict(
             etudid,
             formsemestre_id,
             format="xml",
-            show_uevalid=context.get_preference("bul_show_uevalid", formsemestre_id),
+            show_uevalid=sco_preferences.get_preference(context, "bul_show_uevalid", formsemestre_id),
         )
         d["situation"] = scu.quote_xml_attr(infos["situation"])
         if dpv:
@@ -367,7 +367,7 @@ def formsemestre_bulletinetud_published_dict(
             d["decision_ue"] = []
             if decision[
                 "decisions_ue"
-            ]:  # and context.get_preference('bul_show_uevalid', formsemestre_id): always publish (car utile pour export Apogee)
+            ]:  # and sco_preferences.get_preference(context, 'bul_show_uevalid', formsemestre_id): always publish (car utile pour export Apogee)
                 for ue_id in decision["decisions_ue"].keys():
                     ue = context.do_ue_list({"ue_id": ue_id})[0]
                     d["decision_ue"].append(
diff --git a/app/scodoc/sco_bulletins_legacy.py b/app/scodoc/sco_bulletins_legacy.py
index ba6474d85..653f68f25 100644
--- a/app/scodoc/sco_bulletins_legacy.py
+++ b/app/scodoc/sco_bulletins_legacy.py
@@ -90,7 +90,7 @@ class BulletinGeneratorLegacy(sco_bulletins_generator.BulletinGenerator):
         formsemestre_id = self.infos["formsemestre_id"]
         context = self.context
 
-        bul_show_abs_modules = context.get_preference(
+        bul_show_abs_modules = sco_preferences.get_preference(context, 
             "bul_show_abs_modules", formsemestre_id
         )
 
@@ -106,7 +106,7 @@ class BulletinGeneratorLegacy(sco_bulletins_generator.BulletinGenerator):
 
         H = ['<table class="notes_bulletin" style="background-color: %s;">' % bgcolor]
 
-        if context.get_preference("bul_show_minmax", formsemestre_id):
+        if sco_preferences.get_preference(context, "bul_show_minmax", formsemestre_id):
             minmax = (
                 '<span class="bul_minmax" title="[min, max] promo">[%s, %s]</span>'
                 % (I["moy_min"], I["moy_max"])
@@ -131,7 +131,7 @@ class BulletinGeneratorLegacy(sco_bulletins_generator.BulletinGenerator):
                 if mod["mod_moy_txt"] == "NI":
                     continue  # saute les modules où on n'est pas inscrit
                 H.append('<tr class="notes_bulletin_row_mod%s">' % rowstyle)
-                if context.get_preference("bul_show_minmax_mod", formsemestre_id):
+                if sco_preferences.get_preference(context, "bul_show_minmax_mod", formsemestre_id):
                     rang_minmax = '%s <span class="bul_minmax" title="[min, max] UE">[%s, %s]</span>' % (
                         mod["mod_rang_txt"],
                         scu.fmt_note(mod["stats"]["min"]),
@@ -178,7 +178,7 @@ class BulletinGeneratorLegacy(sco_bulletins_generator.BulletinGenerator):
             rowstyle = ""
             plusminus = minuslink  #
             if ue["ue_status"]["is_capitalized"]:
-                if context.get_preference("bul_show_ue_cap_details", formsemestre_id):
+                if sco_preferences.get_preference(context, "bul_show_ue_cap_details", formsemestre_id):
                     plusminus = minuslink
                     hide = ""
                 else:
@@ -208,7 +208,7 @@ class BulletinGeneratorLegacy(sco_bulletins_generator.BulletinGenerator):
                 )
 
             H.append('<tr class="notes_bulletin_row_ue">')
-            if context.get_preference("bul_show_minmax", formsemestre_id):
+            if sco_preferences.get_preference(context, "bul_show_minmax", formsemestre_id):
                 moy_txt = (
                     '%s <span class="bul_minmax" title="[min, max] UE">[%s, %s]</span>'
                     % (
@@ -444,11 +444,11 @@ def _bulletin_pdf_table_legacy(context, I, version="long"):
     S = BulTableStyle()
     P = []  # elems pour gen. pdf
     formsemestre_id = I["formsemestre_id"]
-    bul_show_abs_modules = context.get_preference(
+    bul_show_abs_modules = sco_preferences.get_preference(context, 
         "bul_show_abs_modules", formsemestre_id
     )
 
-    if context.get_preference("bul_show_minmax", formsemestre_id):
+    if sco_preferences.get_preference(context, "bul_show_minmax", formsemestre_id):
         minmax = ' <font size="8">[%s, %s]</font>' % (I["moy_min"], I["moy_max"])
     else:
         minmax = ""
@@ -470,7 +470,7 @@ def _bulletin_pdf_table_legacy(context, I, version="long"):
             if mod["mod_moy_txt"] == "NI":
                 continue  # saute les modules où on n'est pas inscrit
             S.modline(ue_type=ue_type)
-            if context.get_preference("bul_show_minmax_mod", formsemestre_id):
+            if sco_preferences.get_preference(context, "bul_show_minmax_mod", formsemestre_id):
                 rang_minmax = '%s <font size="8">[%s, %s]</font>' % (
                     mod["mod_rang_txt"],
                     scu.fmt_note(mod["stats"]["min"]),
@@ -510,11 +510,11 @@ def _bulletin_pdf_table_legacy(context, I, version="long"):
             coef_ue = ""
             ue_descr = "(en cours, non prise en compte)"
             S.ueline()
-            if context.get_preference("bul_show_ue_cap_details", formsemestre_id):
+            if sco_preferences.get_preference(context, "bul_show_ue_cap_details", formsemestre_id):
                 list_modules(ue["modules_capitalized"])
             ue_type = "cur"
 
-        if context.get_preference("bul_show_minmax", formsemestre_id):
+        if sco_preferences.get_preference(context, "bul_show_minmax", formsemestre_id):
             moy_txt = '%s <font size="8">[%s, %s]</font>' % (
                 ue["cur_moy_ue_txt"],
                 ue["min"],
diff --git a/app/scodoc/sco_bulletins_pdf.py b/app/scodoc/sco_bulletins_pdf.py
index a704c0c09..fa8e337d9 100644
--- a/app/scodoc/sco_bulletins_pdf.py
+++ b/app/scodoc/sco_bulletins_pdf.py
@@ -83,10 +83,10 @@ def pdfassemblebulletins(
         return ""
     # Paramètres de mise en page
     margins = (
-        context.get_preference("left_margin", formsemestre_id),
-        context.get_preference("top_margin", formsemestre_id),
-        context.get_preference("right_margin", formsemestre_id),
-        context.get_preference("bottom_margin", formsemestre_id),
+        sco_preferences.get_preference(context, "left_margin", formsemestre_id),
+        sco_preferences.get_preference(context, "top_margin", formsemestre_id),
+        sco_preferences.get_preference(context, "right_margin", formsemestre_id),
+        sco_preferences.get_preference(context, "bottom_margin", formsemestre_id),
     )
 
     report = cStringIO.StringIO()  # in-memory document, no disk file
@@ -102,7 +102,7 @@ def pdfassemblebulletins(
             margins=margins,
             pagesbookmarks=pagesbookmarks,
             filigranne=filigranne,
-            preferences=context.get_preferences(formsemestre_id),
+            preferences=sco_preferences.SemPreferences(context, formsemestre_id),
         )
     )
     document.build(objects)
@@ -191,7 +191,7 @@ def get_formsemestre_bulletins_pdf(
         bookmarks[i] = scu.suppress_accents(nt.get_sexnom(etudid))
         i = i + 1
     #
-    infos = {"DeptName": context.get_preference("DeptName", formsemestre_id)}
+    infos = {"DeptName": sco_preferences.get_preference(context, "DeptName", formsemestre_id)}
     if REQUEST:
         server_name = REQUEST.BASE0
     else:
@@ -241,7 +241,7 @@ def get_etud_bulletins_pdf(context, etudid, REQUEST, version="selectedevals"):
         filigrannes[i] = filigranne
         bookmarks[i] = sem["session_id"]  # eg RT-DUT-FI-S1-2015
         i = i + 1
-    infos = {"DeptName": context.get_preference("DeptName")}
+    infos = {"DeptName": sco_preferences.get_preference(context, "DeptName")}
     if REQUEST:
         server_name = REQUEST.BASE0
     else:
diff --git a/app/scodoc/sco_bulletins_standard.py b/app/scodoc/sco_bulletins_standard.py
index ce34c2b51..d081d1242 100644
--- a/app/scodoc/sco_bulletins_standard.py
+++ b/app/scodoc/sco_bulletins_standard.py
@@ -105,7 +105,7 @@ class BulletinGeneratorStandard(sco_bulletins_generator.BulletinGenerator):
             columns_ids=colkeys,
             pdf_table_style=pdf_style,
             pdf_col_widths=[colWidths[k] for k in colkeys],
-            preferences=self.context.get_preferences(formsemestre_id),
+            preferences=self.sco_preferences.SemPreferences(context, formsemestre_id),
             html_class="notes_bulletin",
             html_class_ignore_default=True,
             html_with_td_classes=True,
@@ -286,7 +286,7 @@ class BulletinGeneratorStandard(sco_bulletins_generator.BulletinGenerator):
         context = self.context
         P = []  # elems pour générer table avec gen_table (liste de dicts)
         formsemestre_id = I["formsemestre_id"]
-        prefs = context.get_preferences(formsemestre_id)
+        prefs = sco_preferences.SemPreferences(context, formsemestre_id)
 
         # Colonnes à afficher:
         with_col_abs = prefs["bul_show_abs_modules"]
diff --git a/app/scodoc/sco_bulletins_ucac.py b/app/scodoc/sco_bulletins_ucac.py
index 87510bf4c..66f993527 100644
--- a/app/scodoc/sco_bulletins_ucac.py
+++ b/app/scodoc/sco_bulletins_ucac.py
@@ -76,7 +76,7 @@ class BulletinGeneratorUCAC(sco_bulletins_standard.BulletinGeneratorStandard):
         I = self.infos
         context = self.context
         formsemestre_id = I["formsemestre_id"]
-        prefs = context.get_preferences(formsemestre_id)
+        prefs = sco_preferences.SemPreferences(context, formsemestre_id)
 
         P = []  # elems pour générer table avec gen_table (liste de dicts)
 
@@ -195,7 +195,7 @@ class BulletinGeneratorUCAC(sco_bulletins_standard.BulletinGeneratorStandard):
             ue_type = None
             # --- UE capitalisée:
             if ue["ue_status"]["is_capitalized"]:
-                if context.get_preference("bul_show_ue_cap_details", formsemestre_id):
+                if sco_preferences.get_preference(context, "bul_show_ue_cap_details", formsemestre_id):
                     nb_modules = len(ue["modules_capitalized"])
                     hidden = False
                     cssstyle = ""
diff --git a/app/scodoc/sco_bulletins_xml.py b/app/scodoc/sco_bulletins_xml.py
index 8d9aaecb1..1eb9be318 100644
--- a/app/scodoc/sco_bulletins_xml.py
+++ b/app/scodoc/sco_bulletins_xml.py
@@ -139,7 +139,7 @@ def make_xml_formsemestre_bulletinetud(
     mg = scu.fmt_note(nt.get_etud_moy_gen(etudid))
     if (
         nt.get_moduleimpls_attente()
-        or context.get_preference("bul_show_rangs", formsemestre_id) == 0
+        or sco_preferences.get_preference(context, "bul_show_rangs", formsemestre_id) == 0
     ):
         # n'affiche pas le rang sur le bulletin s'il y a des
         # notes en attente dans ce semestre
@@ -247,7 +247,7 @@ def make_xml_formsemestre_bulletinetud(
                 moy=scu.fmt_note(modstat["moy"]),
             )
             doc._pop()
-            if context.get_preference("bul_show_mod_rangs", formsemestre_id):
+            if sco_preferences.get_preference(context, "bul_show_mod_rangs", formsemestre_id):
                 doc._push()
                 doc.rang(value=nt.mod_rangs[modimpl["moduleimpl_id"]][0][etudid])
                 doc._pop()
@@ -283,7 +283,7 @@ def make_xml_formsemestre_bulletinetud(
                         doc._pop()
                 # Evaluations incomplètes ou futures:
                 complete_eval_ids = set([e["evaluation_id"] for e in evals])
-                if context.get_preference("bul_show_all_evals", formsemestre_id):
+                if sco_preferences.get_preference(context, "bul_show_all_evals", formsemestre_id):
                     all_evals = context.do_evaluation_list(
                         args={"moduleimpl_id": modimpl["moduleimpl_id"]}
                     )
@@ -336,7 +336,7 @@ def make_xml_formsemestre_bulletinetud(
             doc._pop()
             doc._pop()
     # --- Absences
-    if context.get_preference("bul_show_abs", formsemestre_id):
+    if sco_preferences.get_preference(context, "bul_show_abs", formsemestre_id):
         AbsEtudSem = sco_abs.getAbsSemEtud(context, sem, etudid)
         nbabs = AbsEtudSem.CountAbs()
         nbabsjust = AbsEtudSem.CountAbsJust()
@@ -345,7 +345,7 @@ def make_xml_formsemestre_bulletinetud(
         doc._pop()
     # --- Decision Jury
     if (
-        context.get_preference("bul_show_decision", formsemestre_id)
+        sco_preferences.get_preference(context, "bul_show_decision", formsemestre_id)
         or xml_with_decisions
     ):
         infos, dpv = sco_bulletins.etud_descr_situation_semestre(
@@ -353,7 +353,7 @@ def make_xml_formsemestre_bulletinetud(
             etudid,
             formsemestre_id,
             format="xml",
-            show_uevalid=context.get_preference("bul_show_uevalid", formsemestre_id),
+            show_uevalid=sco_preferences.get_preference(context, "bul_show_uevalid", formsemestre_id),
         )
         doc.situation(scu.quote_xml_attr(infos["situation"]))
         if dpv:
@@ -383,7 +383,7 @@ def make_xml_formsemestre_bulletinetud(
 
             if decision[
                 "decisions_ue"
-            ]:  # and context.get_preference('bul_show_uevalid', formsemestre_id): always publish (car utile pour export Apogee)
+            ]:  # and sco_preferences.get_preference(context, 'bul_show_uevalid', formsemestre_id): always publish (car utile pour export Apogee)
                 for ue_id in decision["decisions_ue"].keys():
                     ue = context.do_ue_list({"ue_id": ue_id})[0]
                     doc._push()
diff --git a/app/scodoc/sco_cost_formation.py b/app/scodoc/sco_cost_formation.py
index 136a0f3c5..81591f677 100644
--- a/app/scodoc/sco_cost_formation.py
+++ b/app/scodoc/sco_cost_formation.py
@@ -124,7 +124,7 @@ def formsemestre_table_estim_cost(
         ),
         rows=T,
         html_sortable=True,
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
         html_class="table_leftalign table_listegroupe",
         xls_before_table=[
             ["%(titre)s %(num_sem)s %(modalitestr)s" % sem],
@@ -193,9 +193,12 @@ def formsemestre_estim_cost(
         coef_tp,
     )
     tab.html_before_table = h
-    tab.base_url = (
-        "%s?formsemestre_id=%s&n_group_td=%s&n_group_tp=%s&coef_tp=%s"
-        % (REQUEST.URL0, formsemestre_id, n_group_td, n_group_tp, coef_tp)
+    tab.base_url = "%s?formsemestre_id=%s&n_group_td=%s&n_group_tp=%s&coef_tp=%s" % (
+        REQUEST.URL0,
+        formsemestre_id,
+        n_group_td,
+        n_group_tp,
+        coef_tp,
     )
 
     return tab.make_page(context, format=format, REQUEST=REQUEST)
diff --git a/app/scodoc/sco_debouche.py b/app/scodoc/sco_debouche.py
index a02e208d9..143b629a0 100644
--- a/app/scodoc/sco_debouche.py
+++ b/app/scodoc/sco_debouche.py
@@ -183,7 +183,9 @@ def table_debouche_etudids(context, etudids, keep_numeric=True):
         # html_col_width='4em',
         html_sortable=True,
         html_class="table_leftalign table_listegroupe",
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     return tab
 
diff --git a/app/scodoc/sco_dept.py b/app/scodoc/sco_dept.py
index 1b9341a2d..ad1531a7d 100644
--- a/app/scodoc/sco_dept.py
+++ b/app/scodoc/sco_dept.py
@@ -118,7 +118,7 @@ def index_html(context, REQUEST=None, showcodes=0, showsemtable=0):
             """<hr/>
         <h2>Semestres de %s</h2>
         """
-            % context.get_preference("DeptName")
+            % sco_preferences.get_preference(context, "DeptName")
         )
         H.append(_sem_table_gt(context, sems).html())
         H.append("</table>")
@@ -171,7 +171,11 @@ Chercher étape courante: <input name="etape_apo" type="text" size="8" spellchec
     """
     )
     #
-    return html_sco_header.sco_header(context, REQUEST) + "\n".join(H) + html_sco_header.sco_footer(context, REQUEST)
+    return (
+        html_sco_header.sco_header(context, REQUEST)
+        + "\n".join(H)
+        + html_sco_header.sco_footer(context, REQUEST)
+    )
 
 
 def _sem_table(context, sems):
@@ -239,7 +243,9 @@ def _sem_table_gt(context, sems, showcodes=False):
         html_sortable=True,
         # base_url = '%s?formsemestre_id=%s' % (REQUEST.URL0, formsemestre_id),
         # caption='Maquettes enregistrées',
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
 
     return tab
diff --git a/app/scodoc/sco_dump_db.py b/app/scodoc/sco_dump_db.py
index 59f7f5c02..41f95596a 100644
--- a/app/scodoc/sco_dump_db.py
+++ b/app/scodoc/sco_dump_db.py
@@ -188,7 +188,7 @@ def _send_db(context, REQUEST, ano_db_name):
         scu.SCO_DUMP_UP_URL,
         files=files,
         data={
-            "dept_name": context.get_preference("DeptName"),
+            "dept_name": sco_preferences.get_preference(context, "DeptName"),
             "serial": _get_scodoc_serial(context),
             "sco_user": str(REQUEST.AUTHENTICATED_USER),
             "sent_by": context.Users.user_info(str(REQUEST.AUTHENTICATED_USER))[
diff --git a/app/scodoc/sco_edit_matiere.py b/app/scodoc/sco_edit_matiere.py
index 1c2f1ae4a..77e489534 100644
--- a/app/scodoc/sco_edit_matiere.py
+++ b/app/scodoc/sco_edit_matiere.py
@@ -40,7 +40,9 @@ def matiere_create(context, ue_id=None, REQUEST=None):
     """Creation d'une matiere"""
     UE = context.do_ue_list(args={"ue_id": ue_id})[0]
     H = [
-        html_sco_header.sco_header(context, REQUEST, page_title="Création d'une matière"),
+        html_sco_header.sco_header(
+            context, REQUEST, page_title="Création d'une matière"
+        ),
         """<h2>Création d'une matière dans l'UE %(titre)s (%(acronyme)s)</h2>""" % UE,
         """<p class="help">Les matières sont des groupes de modules dans une UE
 d'une formation donnée. Les matières servent surtout pour la
@@ -100,7 +102,9 @@ def matiere_delete(context, matiere_id=None, REQUEST=None):
     M = context.do_matiere_list(args={"matiere_id": matiere_id})[0]
     UE = context.do_ue_list(args={"ue_id": M["ue_id"]})[0]
     H = [
-        html_sco_header.sco_header(context, REQUEST, page_title="Suppression d'une matière"),
+        html_sco_header.sco_header(
+            context, REQUEST, page_title="Suppression d'une matière"
+        ),
         "<h2>Suppression de la matière %(titre)s" % M,
         " dans l'UE (%(acronyme)s))</h2>" % UE,
     ]
@@ -138,7 +142,9 @@ def matiere_edit(context, matiere_id=None, REQUEST=None):
     ue_names = ["%(acronyme)s (%(titre)s)" % u for u in ues]
     ue_ids = [u["ue_id"] for u in ues]
     H = [
-        html_sco_header.sco_header(context, REQUEST, page_title="Modification d'une matière"),
+        html_sco_header.sco_header(
+            context, REQUEST, page_title="Modification d'une matière"
+        ),
         """<h2>Modification de la matière %(titre)s""" % F,
         """(formation %(acronyme)s, version %(version)s)</h2>""" % Fo,
     ]
@@ -182,7 +188,9 @@ associé.
     dest_url = context.NotesURL() + "/ue_list?formation_id=" + U["formation_id"]
 
     if tf[0] == 0:
-        return "\n".join(H) + tf[1] + help + html_sco_header.sco_footer(context, REQUEST)
+        return (
+            "\n".join(H) + tf[1] + help + html_sco_header.sco_footer(context, REQUEST)
+        )
     elif tf[0] == -1:
         return REQUEST.RESPONSE.redirect(dest_url)
     else:
@@ -210,3 +218,18 @@ associé.
         context.do_matiere_edit(tf[2])
 
         return REQUEST.RESPONSE.redirect(dest_url)
+
+
+def matiere_is_locked(context, matiere_id):
+    """True if matiere should not be modified
+    (contains modules used in a locked formsemestre)
+    """
+    r = ndb.SimpleDictFetch(
+        context,
+        """SELECT ma.* from notes_matieres ma, notes_modules mod, notes_formsemestre sem, notes_moduleimpl mi
+        WHERE ma.matiere_id = mod.matiere_id AND mi.module_id = mod.module_id AND mi.formsemestre_id = sem.formsemestre_id
+        AND ma.matiere_id = %(matiere_id)s AND sem.etat = 0
+        """,
+        {"matiere_id": matiere_id},
+    )
+    return len(r) > 0
\ No newline at end of file
diff --git a/app/scodoc/sco_edit_ue.py b/app/scodoc/sco_edit_ue.py
index 18cf73498..5be47eb0c 100644
--- a/app/scodoc/sco_edit_ue.py
+++ b/app/scodoc/sco_edit_ue.py
@@ -73,7 +73,9 @@ def ue_edit(context, ue_id=None, create=False, formation_id=None, REQUEST=None):
     parcours = sco_codes_parcours.get_parcours_from_code(Fo["type_parcours"])
 
     H = [
-        html_sco_header.sco_header(context, REQUEST, page_title=title, javascripts=["js/edit_ue.js"]),
+        html_sco_header.sco_header(
+            context, REQUEST, page_title=title, javascripts=["js/edit_ue.js"]
+        ),
         "<h2>" + title,
         " (formation %(acronyme)s, version %(version)s)</h2>" % Fo,
         """
@@ -323,7 +325,8 @@ def ue_list(context, formation_id=None, msg="", REQUEST=None):
         "delete_small_dis_img", title="Suppression impossible (module utilisé)"
     )
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             cssstyles=["libjs/jQuery-tagEditor/jquery.tag-editor.css"],
             javascripts=[
@@ -479,21 +482,25 @@ Si vous souhaitez modifier cette formation (par exemple pour y ajouter un module
         for Mat in Matlist:
             if not parcours.UE_IS_MODULE:
                 H.append('<li class="notes_matiere_list">')
-                if editable and not sco_edit_matiere.matiere_is_locked(context, Mat["matiere_id"]):
+                if editable and not sco_edit_matiere.matiere_is_locked(
+                    context, Mat["matiere_id"]
+                ):
                     H.append(
                         '<a class="stdlink" href="matiere_edit?matiere_id=%(matiere_id)s">'
                         % Mat
                     )
                 H.append("%(titre)s" % Mat)
-                if editable and not sco_edit_matiere.matiere_is_locked(context, Mat["matiere_id"]):
+                if editable and not sco_edit_matiere.matiere_is_locked(
+                    context, Mat["matiere_id"]
+                ):
                     H.append("</a>")
 
             H.append('<ul class="notes_module_list">')
             Modlist = context.do_module_list(args={"matiere_id": Mat["matiere_id"]})
             im = 0
             for Mod in Modlist:
-                Mod["nb_moduleimpls"] = sco_edit_module.module_count_moduleimpls(context, 
-                    Mod["module_id"]
+                Mod["nb_moduleimpls"] = sco_edit_module.module_count_moduleimpls(
+                    context, Mod["module_id"]
                 )
                 klass = "notes_module_list"
                 if Mod["module_type"] == scu.MODULE_MALUS:
@@ -525,9 +532,7 @@ Si vous souhaitez modifier cette formation (par exemple pour y ajouter un module
                     H.append(delete_disabled_icon)
                 H.append("</span>")
 
-                mod_editable = (
-                    editable  # and not sco_edit_module.module_is_locked(context, Mod['module_id'])
-                )
+                mod_editable = editable  # and not sco_edit_module.module_is_locked(context, Mod['module_id'])
                 if mod_editable:
                     H.append(
                         '<a class="discretelink" title="Modifier le module numéro %(numero)s, utilisé par %(nb_moduleimpls)d sessions" href="module_edit?module_id=%(module_id)s">'
@@ -812,8 +817,8 @@ def formation_table_recap(context, formation_id, format="html", REQUEST=None):
         for Mat in Matlist:
             Modlist = context.do_module_list(args={"matiere_id": Mat["matiere_id"]})
             for Mod in Modlist:
-                Mod["nb_moduleimpls"] = sco_edit_module.module_count_moduleimpls(context, 
-                    Mod["module_id"]
+                Mod["nb_moduleimpls"] = sco_edit_module.module_count_moduleimpls(
+                    context, Mod["module_id"]
                 )
                 #
                 T.append(
@@ -876,7 +881,9 @@ def formation_table_recap(context, formation_id, format="html", REQUEST=None):
         page_title=title,
         html_title="<h2>" + title + "</h2>",
         pdf_title=title,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     return tab.make_page(context, format=format, REQUEST=REQUEST)
 
diff --git a/app/scodoc/sco_edt_cal.py b/app/scodoc/sco_edt_cal.py
index 6f560ab20..17cd44873 100644
--- a/app/scodoc/sco_edt_cal.py
+++ b/app/scodoc/sco_edt_cal.py
@@ -52,7 +52,7 @@ def formsemestre_get_ics_url(context, sem):
     Par exemple:
     https://example.fr/agenda/{sem[etapes][0]}
     """
-    ics_url_tmpl = context.get_preference("edt_sem_ics_url", sem["formsemestre_id"])
+    ics_url_tmpl = sco_preferences.get_preference(context, "edt_sem_ics_url", sem["formsemestre_id"])
     if not ics_url_tmpl:
         return None
     try:
@@ -98,7 +98,7 @@ def get_edt_transcodage_groups(context, formsemestre_id):
     edt2sco = {}
     sco2edt = {}
     msg = ""  # message erreur, '' si ok
-    txt = context.get_preference("edt_groups2scodoc", formsemestre_id)
+    txt = sco_preferences.get_preference(context, "edt_groups2scodoc", formsemestre_id)
     if not txt:
         return edt2sco, sco2edt, msg
 
diff --git a/app/scodoc/sco_etape_apogee_view.py b/app/scodoc/sco_etape_apogee_view.py
index 5443e52c9..d3d4aa1a8 100644
--- a/app/scodoc/sco_etape_apogee_view.py
+++ b/app/scodoc/sco_etape_apogee_view.py
@@ -76,7 +76,9 @@ def apo_semset_maq_status(
     block_export_res_modules = int(block_export_res_modules)
     block_export_res_sdj = int(block_export_res_sdj)
 
-    prefs = context.get_preferences()
+    prefs = sco_preferences.SemPreferences(
+        context,
+    )
 
     tab_archives = table_apo_csv_list(context, semset, REQUEST=REQUEST)
 
@@ -98,7 +100,8 @@ def apo_semset_maq_status(
         ok_for_export &= semset["jury_ok"]
 
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title="Export Apogée",
             javascripts=["js/apo_semset_maq_status.js"],
@@ -474,7 +477,9 @@ def table_apo_csv_list(context, semset, REQUEST=None):
         html_sortable=True,
         # base_url = '%s?formsemestre_id=%s' % (REQUEST.URL0, formsemestre_id),
         # caption='Maquettes enregistrées',
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
 
     return tab
@@ -559,8 +564,12 @@ def _view_etuds_page(
         etuds.sort(key=lambda x: (x["nom"], x["prenom"]))
 
     H = [
-        html_sco_header.sco_header(context, 
-            REQUEST, page_title=title, init_qtip=True, javascripts=["js/etud_info.js"]
+        html_sco_header.sco_header(
+            context,
+            REQUEST,
+            page_title=title,
+            init_qtip=True,
+            javascripts=["js/etud_info.js"],
         ),
         "<h2>%s</h2>" % title,
     ]
@@ -579,7 +588,9 @@ def _view_etuds_page(
         html_sortable=True,
         html_class="table_leftalign",
         filename="students_apo",
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     if format != "html":
         return tab.make_page(context, format=format, REQUEST=REQUEST)
@@ -704,7 +715,8 @@ def view_apo_csv(context, etape_apo="", semset_id="", format="html", REQUEST=Non
     ) = sco_etape_apogee.apo_csv_semset_check(context, semset)
 
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title="Maquette Apogée enregistrée pour %s" % etape_apo,
             init_qtip=True,
@@ -728,7 +740,11 @@ def view_apo_csv(context, etape_apo="", semset_id="", format="html", REQUEST=Non
     # Liste des étudiants (sans les résultats pour le moment): TODO
     etuds = apo_data.etuds
     if not etuds:
-        return "\n".join(H) + "<p>Aucun étudiant</p>" + html_sco_header.sco_footer(context, REQUEST)
+        return (
+            "\n".join(H)
+            + "<p>Aucun étudiant</p>"
+            + html_sco_header.sco_footer(context, REQUEST)
+        )
 
     # Ajout infos sur ScoDoc vs Apogee
     for e in etuds:
@@ -758,7 +774,9 @@ def view_apo_csv(context, etape_apo="", semset_id="", format="html", REQUEST=Non
         base_url="%s?etape_apo=%s&semset_id=%s" % (REQUEST.URL0, etape_apo, semset_id),
         filename="students_" + etape_apo,
         caption="Etudiants Apogée en " + etape_apo,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
 
     if format != "html":
@@ -794,7 +812,9 @@ def apo_csv_export_results(
     # nota: on peut éventuellement exporter même si tout n'est pas ok
     # mais le lien via le tableau de bord n'est pas actif
     # Les fichiers résultats ne sont pas stockés: pas besoin de permission particulière
-    prefs = context.get_preferences()
+    prefs = sco_preferences.SemPreferences(
+        context,
+    )
     export_res_etape = prefs["export_res_etape"] and not int(block_export_res_etape)
     export_res_sem = prefs["export_res_sem"] and not int(block_export_res_sem)
     export_res_ues = prefs["export_res_ues"] and not int(block_export_res_ues)
@@ -835,7 +855,7 @@ def apo_csv_export_results(
         )
 
     basename = (
-        context.get_preference("DeptName")
+        sco_preferences.get_preference(context, "DeptName")
         + str(annee_scolaire)
         + "-%s-" % periode
         + "-".join(etapes_apo)
diff --git a/app/scodoc/sco_evaluations.py b/app/scodoc/sco_evaluations.py
index cd6908ace..9a82bfa33 100644
--- a/app/scodoc/sco_evaluations.py
+++ b/app/scodoc/sco_evaluations.py
@@ -494,8 +494,12 @@ def formsemestre_evaluations_cal(context, formsemestre_id, REQUEST=None):
     )
 
     H = [
-        html_sco_header.html_sem_header(context, 
-            REQUEST, "Evaluations du semestre", sem, cssstyles=["css/calabs.css"]
+        html_sco_header.html_sem_header(
+            context,
+            REQUEST,
+            "Evaluations du semestre",
+            sem,
+            cssstyles=["css/calabs.css"],
         ),
         '<div class="cal_evaluations">',
         CalHTML,
@@ -622,7 +626,7 @@ def formsemestre_evaluations_delai_correction(
         html_sortable=True,
         html_title="<h2>Correction des évaluations du semestre</h2>",
         caption="Correction des évaluations du semestre",
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
         base_url="%s?formsemestre_id=%s" % (REQUEST.URL0, formsemestre_id),
         origin="Généré par %s le " % VERSION.SCONAME + scu.timedate_human_repr() + "",
         filename=scu.make_filename("evaluations_delais_" + sem["titreannee"]),
@@ -1055,7 +1059,14 @@ def evaluation_create_form(
     dest_url = "moduleimpl_status?moduleimpl_id=%s" % M["moduleimpl_id"]
     if tf[0] == 0:
         head = html_sco_header.sco_header(context, REQUEST, page_title=page_title)
-        return head + "\n".join(H) + "\n" + tf[1] + help + html_sco_header.sco_footer(context, REQUEST)
+        return (
+            head
+            + "\n".join(H)
+            + "\n"
+            + tf[1]
+            + help
+            + html_sco_header.sco_footer(context, REQUEST)
+        )
     elif tf[0] == -1:
         return REQUEST.RESPONSE.redirect(dest_url)
     else:
diff --git a/app/scodoc/sco_excel.py b/app/scodoc/sco_excel.py
index d4a2b20ba..29cd2b164 100644
--- a/app/scodoc/sco_excel.py
+++ b/app/scodoc/sco_excel.py
@@ -571,7 +571,7 @@ def Excel_feuille_listeappel(
         (
             "%s %s (%s - %s)"
             % (
-                context.get_preference("DeptName", formsemestre_id),
+                sco_preferences.get_preference(context, "DeptName", formsemestre_id),
                 notesdb.unquote(sem["titre_num"]),
                 sem["date_debut"],
                 sem["date_fin"],
diff --git a/app/scodoc/sco_export_results.py b/app/scodoc/sco_export_results.py
index c6bb708ab..b9a6ec1f5 100644
--- a/app/scodoc/sco_export_results.py
+++ b/app/scodoc/sco_export_results.py
@@ -104,7 +104,9 @@ def _build_results_table(context, start_date=None, end_date=None, types_parcours
         origin="Généré par %s le " % VERSION.SCONAME + scu.timedate_human_repr() + "",
         html_class="table_leftalign",
         html_sortable=True,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     return tab, semlist
 
@@ -279,7 +281,8 @@ def scodoc_table_results(
     info_sems.append("</ul>")
 
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title="Export résultats",
             init_qtip=True,
diff --git a/app/scodoc/sco_find_etud.py b/app/scodoc/sco_find_etud.py
index 5077d18c0..9e0e26cfb 100644
--- a/app/scodoc/sco_find_etud.py
+++ b/app/scodoc/sco_find_etud.py
@@ -88,7 +88,9 @@ def form_search_etud(
 
     if add_headers:
         return (
-            html_sco_header.sco_header(context, REQUEST, page_title="Choix d'un étudiant")
+            html_sco_header.sco_header(
+                context, REQUEST, page_title="Choix d'un étudiant"
+            )
             + "\n".join(H)
             + html_sco_header.sco_footer(context, REQUEST)
         )
@@ -122,7 +124,8 @@ def search_etud_in_dept(context, expnom="", REQUEST=None):
         return context.ficheEtud(etudid=etuds[0]["etudid"], REQUEST=REQUEST)
 
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             page_title="Recherche d'un étudiant",
             no_side_bar=True,
             init_qtip=True,
@@ -158,7 +161,9 @@ def search_etud_in_dept(context, expnom="", REQUEST=None):
             rows=etuds,
             html_sortable=True,
             html_class="table_leftalign",
-            preferences=context.get_preferences(),
+            preferences=sco_preferences.SemPreferences(
+                context,
+            ),
         )
         H.append(tab.html())
         if len(etuds) > 20:  # si la page est grande
@@ -336,7 +341,9 @@ def table_etud_in_accessible_depts(context, expnom=None, REQUEST=None):
     H.append("</div>")
 
     return (
-        html_sco_header.scodoc_top_html_header(context, REQUEST, page_title="Choix d'un étudiant")
+        html_sco_header.scodoc_top_html_header(
+            context, REQUEST, page_title="Choix d'un étudiant"
+        )
         + "\n".join(H)
         + html_sco_header.standard_html_footer()
     )
diff --git a/app/scodoc/sco_formations.py b/app/scodoc/sco_formations.py
index 150a28dff..5e33d7214 100644
--- a/app/scodoc/sco_formations.py
+++ b/app/scodoc/sco_formations.py
@@ -333,5 +333,7 @@ def formation_list_table(context, formation_id=None, args={}, REQUEST=None):
         base_url="%s?formation_id=%s" % (REQUEST.URL0, formation_id),
         page_title=title,
         pdf_title=title,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
diff --git a/app/scodoc/sco_formsemestre.py b/app/scodoc/sco_formsemestre.py
index 27d94e108..cc4aaf63a 100644
--- a/app/scodoc/sco_formsemestre.py
+++ b/app/scodoc/sco_formsemestre.py
@@ -543,9 +543,13 @@ def table_formsemestres(
         "etapes_apo_str": "Apo.",
     }
     if sems:
-        preferences = context.get_preferences(sems[0]["formsemestre_id"])
+        preferences = sco_preferences.SemPreferences(
+            context, sems[0]["formsemestre_id"]
+        )
     else:
-        preferences = context.get_preferences()
+        preferences = sco_preferences.SemPreferences(
+            context,
+        )
     tab = GenTable(
         columns_ids=columns_ids,
         rows=sems,
diff --git a/app/scodoc/sco_formsemestre_edit.py b/app/scodoc/sco_formsemestre_edit.py
index 604997a5f..4e295f8e3 100644
--- a/app/scodoc/sco_formsemestre_edit.py
+++ b/app/scodoc/sco_formsemestre_edit.py
@@ -75,7 +75,8 @@ def formsemestre_editwithmodules(context, REQUEST, formsemestre_id):
     # portage from dtml
     sem = sco_formsemestre.get_formsemestre(context, formsemestre_id)
     H = [
-        html_sco_header.html_sem_header(context, 
+        html_sco_header.html_sem_header(
+            context,
             REQUEST,
             "Modification du semestre",
             sem,
@@ -383,7 +384,7 @@ def do_formsemestre_createwithmodules(context, REQUEST=None, edit=False):
                 "size": 32,
                 "title": "Element(s) Apogée:",
                 "explanation": "du semestre (ex: VRTW1). Séparés par des virgules.",
-                "allow_null": not context.get_preference(
+                "allow_null": not sco_preferences.get_preference(context, 
                     "always_require_apo_sem_codes"
                 ),
             },
@@ -396,7 +397,7 @@ def do_formsemestre_createwithmodules(context, REQUEST=None, edit=False):
                 "size": 32,
                 "title": "Element(s) Apogée:",
                 "explanation": "de l'année (ex: VRT1A). Séparés par des virgules.",
-                "allow_null": not context.get_preference(
+                "allow_null": not sco_preferences.get_preference(context, 
                     "always_require_apo_sem_codes"
                 ),
             },
@@ -642,7 +643,7 @@ def do_formsemestre_createwithmodules(context, REQUEST=None, edit=False):
         # check dates
         if ndb.DateDMYtoISO(tf[2]["date_debut"]) > ndb.DateDMYtoISO(tf[2]["date_fin"]):
             msg = '<ul class="tf-msg"><li class="tf-msg">Dates de début et fin incompatibles !</li></ul>'
-        if context.get_preference("always_require_apo_sem_codes") and not any(
+        if sco_preferences.get_preference(context, "always_require_apo_sem_codes") and not any(
             [tf[2]["etape_apo" + str(n)] for n in range(0, scu.EDIT_NB_ETAPES + 1)]
         ):
             msg = '<ul class="tf-msg"><li class="tf-msg">Code étape Apogée manquant</li></ul>'
@@ -867,7 +868,8 @@ def formsemestre_clone(context, formsemestre_id, REQUEST=None):
     }
 
     H = [
-        html_sco_header.html_sem_header(context, 
+        html_sco_header.html_sem_header(
+            context,
             REQUEST,
             "Copie du semestre",
             sem,
@@ -1035,7 +1037,7 @@ def do_formsemestre_clone(
     # NB: don't copy notes_formsemestre_custommenu (usually specific)
 
     # 4- Copy new style preferences
-    prefs = context.get_preferences(orig_formsemestre_id)
+    prefs = sco_preferences.SemPreferences(context, orig_formsemestre_id)
 
     if orig_formsemestre_id in prefs.base_prefs.prefs:
         for pname in prefs.base_prefs.prefs[orig_formsemestre_id]:
@@ -1223,7 +1225,9 @@ def formsemestre_delete(context, formsemestre_id, REQUEST=None):
     sem = sco_formsemestre.get_formsemestre(context, formsemestre_id)
     F = context.formation_list(args={"formation_id": sem["formation_id"]})[0]
     H = [
-        html_sco_header.html_sem_header(context, REQUEST, "Suppression du semestre", sem),
+        html_sco_header.html_sem_header(
+            context, REQUEST, "Suppression du semestre", sem
+        ),
         """<div class="ue_warning"><span>Attention !</span>
 <p class="help">A n'utiliser qu'en cas d'erreur lors de la saisie d'une formation. Normalement,
 <b>un semestre ne doit jamais être supprimé</b> (on perd la mémoire des notes et de tous les événements liés à ce semestre !).</p>
@@ -1404,7 +1408,7 @@ def formsemestre_edit_options(context, formsemestre_id, target_url=None, REQUEST
     ok, err = context._check_access_diretud(formsemestre_id, REQUEST)
     if not ok:
         return err
-    return context.get_preferences(formsemestre_id).edit(
+    return sco_preferences.SemPreferences(context, formsemestre_id).edit(
         REQUEST=REQUEST, categories=["bul"]
     )
 
@@ -1523,7 +1527,12 @@ def formsemestre_edit_uecoefs(context, formsemestre_id, err_ue_id=None, REQUEST=
     <p class="warning">Les coefficients indiqués ici ne s'appliquent que pour le traitement des UE capitalisées.
     </p>
     """
-    H = [html_sco_header.html_sem_header(context, REQUEST, "Coefficients des UE du semestre", sem), help]
+    H = [
+        html_sco_header.html_sem_header(
+            context, REQUEST, "Coefficients des UE du semestre", sem
+        ),
+        help,
+    ]
     #
     ues, modimpls = notes_table.get_sem_ues_modimpls(context, formsemestre_id)
     for ue in ues:
@@ -1633,8 +1642,8 @@ def formsemestre_edit_uecoefs(context, formsemestre_id, err_ue_id=None, REQUEST=
             formsemestre_id=formsemestre_id
         )  # > modif coef UE cap (modifs notes de _certains_ etudiants)
 
-        header = html_sco_header.html_sem_header(context, 
-            REQUEST, "Coefficients des UE du semestre", sem
+        header = html_sco_header.html_sem_header(
+            context, REQUEST, "Coefficients des UE du semestre", sem
         )
         return (
             header
@@ -1664,9 +1673,9 @@ def get_formsemestre_session_id(context, sem, F, parcours):
     # F = context.formation_list( args={ 'formation_id' : sem['formation_id'] } )[0]
     # parcours = sco_codes_parcours.get_parcours_from_code(F['type_parcours'])
 
-    ImputationDept = context.get_preference("ImputationDept", sem["formsemestre_id"])
+    ImputationDept = sco_preferences.get_preference(context, "ImputationDept", sem["formsemestre_id"])
     if not ImputationDept:
-        ImputationDept = context.get_preference("DeptName")
+        ImputationDept = sco_preferences.get_preference(context, "DeptName")
     ImputationDept = ImputationDept.upper()
     parcours_type = parcours.NAME
     modalite = sem["modalite"]
diff --git a/app/scodoc/sco_formsemestre_status.py b/app/scodoc/sco_formsemestre_status.py
index 8a9392135..f17825022 100644
--- a/app/scodoc/sco_formsemestre_status.py
+++ b/app/scodoc/sco_formsemestre_status.py
@@ -261,7 +261,7 @@ def formsemestre_status_menubar(context, sem, REQUEST):
             "title": "Synchroniser avec étape Apogée",
             "url": "formsemestre_synchro_etuds?formsemestre_id=" + formsemestre_id,
             "enabled": authuser.has_permission(Permission.ScoView, context)
-            and context.get_preference("portal_url")
+            and sco_preferences.get_preference(context, "portal_url")
             and (sem["etat"] == "1"),
         },
         {
@@ -288,7 +288,7 @@ def formsemestre_status_menubar(context, sem, REQUEST):
             "url": "formsemestre_import_etud_admission?formsemestre_id="
             + formsemestre_id,
             "enabled": authuser.has_permission(Permission.ScoEtudChangeAdr, context)
-            and context.get_preference("portal_url"),
+            and sco_preferences.get_preference(context, "portal_url"),
         },
         {
             "title": "Exporter table des étudiants",
@@ -518,7 +518,7 @@ def fill_formsemestre(context, sem, REQUEST=None):
         )
     else:
         sem["locklink"] = ""
-    if context.get_preference("bul_display_publication", formsemestre_id):
+    if sco_preferences.get_preference(context, "bul_display_publication", formsemestre_id):
         if sem["bul_hide_xml"] != "0":
             eyeicon = scu.icontag("hide_img", border="0", title="Bulletins NON publiés")
         else:
@@ -568,7 +568,7 @@ def formsemestre_description_table(
     nt = context._getNotesCache().get_NotesTable(
         context, formsemestre_id
     )  # > liste evaluations
-    use_ue_coefs = context.get_preference("use_ue_coefs", formsemestre_id)
+    use_ue_coefs = sco_preferences.get_preference(context, "use_ue_coefs", formsemestre_id)
     F = context.formation_list(args={"formation_id": sem["formation_id"]})[0]
     parcours = sco_codes_parcours.get_parcours_from_code(F["type_parcours"])
     Mlist = sco_moduleimpl.do_moduleimpl_withmodule_list(
@@ -654,7 +654,7 @@ def formsemestre_description_table(
     sums = {"_css_row_class": "moyenne sortbottom", "ects": sum_ects, "Coef.": sum_coef}
     R.append(sums)
     columns_ids = ["UE", "Code", "Module", "Coef."]
-    if context.get_preference("bul_show_ects", formsemestre_id):
+    if sco_preferences.get_preference(context, "bul_show_ects", formsemestre_id):
         columns_ids += ["ects"]
     columns_ids += ["Inscrits", "Responsable", "Enseignants"]
     if with_evals:
@@ -687,11 +687,11 @@ def formsemestre_description_table(
         base_url="%s?formsemestre_id=%s&with_evals=%s"
         % (REQUEST.URL0, formsemestre_id, with_evals),
         page_title=title,
-        html_title=html_sco_header.html_sem_header(context, 
-            REQUEST, "Description du semestre", sem, with_page_header=False
+        html_title=html_sco_header.html_sem_header(
+            context, REQUEST, "Description du semestre", sem, with_page_header=False
         ),
         pdf_title=title,
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
     )
 
 
@@ -882,8 +882,8 @@ def formsemestre_status_head(
     page_title = page_title or "Modules de "
 
     H = [
-        html_sco_header.html_sem_header(context, 
-            REQUEST, page_title, sem, with_page_header=False, with_h2=False
+        html_sco_header.html_sem_header(
+            context, REQUEST, page_title, sem, with_page_header=False, with_h2=False
         ),
         """<table>
           <tr><td class="fichetitre2">Formation: </td><td>
@@ -927,7 +927,7 @@ Il y a des notes en attente ! Le classement des étudiants n'a qu'une valeur ind
         H.append(
             '<p class="fontorange"><em>Attention: ce semestre couvre plusieurs années scolaires !</em></p>'
         )
-    # elif context.get_preference('bul_display_publication', formsemestre_id):
+    # elif sco_preferences.get_preference(context, 'bul_display_publication', formsemestre_id):
     #    H.append('<p><em>Bulletins publiés sur le portail</em></p>')
 
     return "".join(H)
@@ -1007,7 +1007,7 @@ def formsemestre_status(context, formsemestre_id=None, REQUEST=None):
             prev_ue_id = ue["ue_id"]
             acronyme = ue["acronyme"]
             titre = ue["titre"]
-            if context.get_preference("use_ue_coefs", formsemestre_id):
+            if sco_preferences.get_preference(context, "use_ue_coefs", formsemestre_id):
                 titre += " <b>(coef. %s)</b>" % (ue["coefficient"] or 0.0)
             H.append(
                 """<tr class="formsemestre_status_ue"><td colspan="4">
@@ -1118,7 +1118,7 @@ def formsemestre_status(context, formsemestre_id=None, REQUEST=None):
 
         H.append("</td></tr>")
     H.append("</table></p>")
-    if context.get_preference("use_ue_coefs", formsemestre_id):
+    if sco_preferences.get_preference(context, "use_ue_coefs", formsemestre_id):
         H.append(
             """
         <p class="infop">utilise les coefficients d'UE pour calculer la moyenne générale.</p>
diff --git a/app/scodoc/sco_formsemestre_validation.py b/app/scodoc/sco_formsemestre_validation.py
index 6166c0c35..9ce169ccf 100644
--- a/app/scodoc/sco_formsemestre_validation.py
+++ b/app/scodoc/sco_formsemestre_validation.py
@@ -656,7 +656,7 @@ def formsemestre_recap_parcours_table(
         H.append("</tr>")
         # 3eme ligne: ECTS
         if (
-            context.get_preference("bul_show_ects", sem["formsemestre_id"])
+            sco_preferences.get_preference(context, "bul_show_ects", sem["formsemestre_id"])
             or nt.parcours.ECTS_ONLY
         ):
             etud_moy_infos = nt.get_etud_moy_infos(etudid)
diff --git a/app/scodoc/sco_groups_view.py b/app/scodoc/sco_groups_view.py
index 4826653d8..9bac0ee7d 100644
--- a/app/scodoc/sco_groups_view.py
+++ b/app/scodoc/sco_groups_view.py
@@ -102,8 +102,12 @@ def groups_view(
         )
 
     H = [
-        html_sco_header.sco_header(context, 
-            REQUEST, javascripts=JAVASCRIPTS, cssstyles=CSSSTYLES, init_qtip=True
+        html_sco_header.sco_header(
+            context,
+            REQUEST,
+            javascripts=JAVASCRIPTS,
+            cssstyles=CSSSTYLES,
+            init_qtip=True,
         )
     ]
     # Menu choix groupe
@@ -578,7 +582,7 @@ def groups_table(
     else:
         filename = "etudiants_%s" % groups_infos.groups_filename
 
-    prefs = context.get_preferences(groups_infos.formsemestre_id)
+    prefs = sco_preferences.SemPreferences(context, groups_infos.formsemestre_id)
     tab = GenTable(
         rows=groups_infos.members,
         columns_ids=columns_ids,
@@ -979,7 +983,7 @@ def export_groups_as_moodle_csv(context, formsemestre_id=None, REQUEST=None):
                 elts.append(group_name)
             T.append({"email": etud["email"], "semestre_groupe": "-".join(elts)})
     # Make table
-    prefs = context.get_preferences(formsemestre_id)
+    prefs = sco_preferences.SemPreferences(context, formsemestre_id)
     tab = GenTable(
         rows=T,
         columns_ids=("email", "semestre_groupe"),
diff --git a/app/scodoc/sco_import_users.py b/app/scodoc/sco_import_users.py
index 55ba36a12..5f66b03a7 100644
--- a/app/scodoc/sco_import_users.py
+++ b/app/scodoc/sco_import_users.py
@@ -227,7 +227,7 @@ Pour plus d'informations sur ce logiciel, voir %s
         msg["Subject"] = Header("Mot de passe ScoDoc", scu.SCO_ENCODING)
     else:
         msg["Subject"] = Header("Votre accès ScoDoc", scu.SCO_ENCODING)
-    msg["From"] = context.get_preference("email_from_addr")
+    msg["From"] = sco_preferences.get_preference(context, "email_from_addr")
     msg["To"] = u["email"]
     msg.epilogue = ""
     txt = MIMEText(txt, "plain", scu.SCO_ENCODING)
diff --git a/app/scodoc/sco_inscr_passage.py b/app/scodoc/sco_inscr_passage.py
index b90b0936c..6d41edc65 100644
--- a/app/scodoc/sco_inscr_passage.py
+++ b/app/scodoc/sco_inscr_passage.py
@@ -278,7 +278,9 @@ def formsemestre_inscr_passage(
     # -- check lock
     if sem["etat"] != "1":
         raise ScoValueError("opération impossible: semestre verrouille")
-    header = html_sco_header.sco_header(context, REQUEST, page_title="Passage des étudiants")
+    header = html_sco_header.sco_header(
+        context, REQUEST, page_title="Passage des étudiants"
+    )
     footer = html_sco_header.sco_footer(context, REQUEST)
     H = [header]
     if type(etuds) == type(""):
@@ -412,8 +414,8 @@ def build_page(
         inscrit_groupes_checked = ""
 
     H = [
-        html_sco_header.html_sem_header(context, 
-            REQUEST, "Passages dans le semestre", sem, with_page_header=False
+        html_sco_header.html_sem_header(
+            context, REQUEST, "Passages dans le semestre", sem, with_page_header=False
         ),
         """<form method="post" action="%s">""" % REQUEST.URL0,
         """<input type="hidden" name="formsemestre_id" value="%(formsemestre_id)s"/>
@@ -628,6 +630,8 @@ def etuds_select_box_xls(context, src_cat):
         columns_ids=columns_ids,
         rows=etuds,
         caption="%(title)s. %(help)s" % src_cat["infos"],
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     return tab.excel()
diff --git a/app/scodoc/sco_liste_notes.py b/app/scodoc/sco_liste_notes.py
index b89d05fdc..4e24e0b38 100644
--- a/app/scodoc/sco_liste_notes.py
+++ b/app/scodoc/sco_liste_notes.py
@@ -301,9 +301,9 @@ def _make_table_notes(
                 grc = inscr["etat"]
 
         code = ""  # code pour listings anonyme, à la place du nom
-        if context.get_preference("anonymous_lst_code") == "INE":
+        if sco_preferences.get_preference(context, "anonymous_lst_code") == "INE":
             code = etud["code_ine"]
-        elif context.get_preference("anonymous_lst_code") == "NIP":
+        elif sco_preferences.get_preference(context, "anonymous_lst_code") == "NIP":
             code = etud["code_nip"]
         if not code:  # laisser le code vide n'aurait aucun sens, prenons l'etudid
             code = etudid
@@ -472,7 +472,7 @@ def _make_table_notes(
         html_title=html_title,
         pdf_title=pdf_title,
         html_class="table_leftalign notes_evaluation",
-        preferences=context.get_preferences(M["formsemestre_id"]),
+        preferences=sco_preferences.SemPreferences(context, M["formsemestre_id"]),
         # html_generate_cells=False # la derniere ligne (moyennes) est incomplete
     )
 
@@ -775,7 +775,9 @@ def evaluation_check_absences_html(
 
     if with_header:
         H = [
-            html_sco_header.html_sem_header(context, REQUEST, "Vérification absences à l'évaluation"),
+            html_sco_header.html_sem_header(
+                context, REQUEST, "Vérification absences à l'évaluation"
+            ),
             sco_evaluations.evaluation_describe(
                 context, evaluation_id=evaluation_id, REQUEST=REQUEST
             ),
@@ -859,8 +861,11 @@ def formsemestre_check_absences_html(context, formsemestre_id, REQUEST=None):
     """Affiche etat verification absences pour toutes les evaluations du semestre !"""
     sem = sco_formsemestre.get_formsemestre(context, formsemestre_id)
     H = [
-        html_sco_header.html_sem_header(context, 
-            REQUEST, "Vérification absences aux évaluations de ce semestre", sem
+        html_sco_header.html_sem_header(
+            context,
+            REQUEST,
+            "Vérification absences aux évaluations de ce semestre",
+            sem,
         ),
         """<p class="help">Vérification de la cohérence entre les notes saisies et les absences signalées.
           Sont listés tous les modules avec des évaluations.<br/>Aucune action n'est effectuée:
diff --git a/app/scodoc/sco_lycee.py b/app/scodoc/sco_lycee.py
index 2df177515..84f2eff04 100644
--- a/app/scodoc/sco_lycee.py
+++ b/app/scodoc/sco_lycee.py
@@ -54,7 +54,11 @@ def formsemestre_table_etuds_lycees(
         primostr = "du "
     title = "Lycées des étudiants %ssemestre " % primostr + sem["titreannee"]
     return _table_etuds_lycees(
-        context, etuds, group_lycees, title, context.get_preferences(formsemestre_id)
+        context,
+        etuds,
+        group_lycees,
+        title,
+        sco_preferences.SemPreferences(context, formsemestre_id),
     )
 
 
@@ -70,7 +74,9 @@ def scodoc_table_etuds_lycees(context, format="html", REQUEST=None):
         etuds,
         False,
         "Lycées de TOUS les étudiants",
-        context.get_preferences(),
+        sco_preferences.SemPreferences(
+            context,
+        ),
         no_links=True,
     )
     tab.base_url = REQUEST.URL0
@@ -78,7 +84,8 @@ def scodoc_table_etuds_lycees(context, format="html", REQUEST=None):
     if format != "html":
         return t
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title=tab.page_title,
             init_google_maps=True,
@@ -194,7 +201,8 @@ def formsemestre_etuds_lycees(
         )
     ]
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title=tab.page_title,
             init_google_maps=True,
diff --git a/app/scodoc/sco_news.py b/app/scodoc/sco_news.py
index a5c6ca6ba..5b5d74bf3 100644
--- a/app/scodoc/sco_news.py
+++ b/app/scodoc/sco_news.py
@@ -254,7 +254,7 @@ def _send_news_by_mail(context, n):
     """Notify by email"""
     infos = _get_formsemestre_infos_from_news(context, n)
     formsemestre_id = infos.get("formsemestre_id", None)
-    prefs = context.get_preferences(formsemestre_id=formsemestre_id)
+    prefs = sco_preferences.SemPreferences(context, formsemestre_id=formsemestre_id)
     destinations = prefs["emails_notifications"] or ""
     destinations = [x.strip() for x in destinations.split(",")]
     destinations = [x for x in destinations if x]
diff --git a/app/scodoc/sco_photos.py b/app/scodoc/sco_photos.py
index d6ecb9188..4dc45e88b 100644
--- a/app/scodoc/sco_photos.py
+++ b/app/scodoc/sco_photos.py
@@ -344,7 +344,7 @@ def copy_portal_photo_to_fs(context, etud, REQUEST=None):
     url = photo_portal_url(context, etud)
     if not url:
         return None, "%(nomprenom)s: pas de code NIP" % etud
-    portal_timeout = context.get_preference("portal_timeout")
+    portal_timeout = sco_preferences.get_preference(context, "portal_timeout")
     f = None
     try:
         log("copy_portal_photo_to_fs: getting %s" % url)
diff --git a/app/scodoc/sco_placement.py b/app/scodoc/sco_placement.py
index f983b9f62..d9346a7fe 100644
--- a/app/scodoc/sco_placement.py
+++ b/app/scodoc/sco_placement.py
@@ -309,7 +309,7 @@ def do_placement(context, REQUEST):
             listetud.append((nom, prenom))
     random.shuffle(listetud)
 
-    sem_preferences = context.get_preferences()
+    sem_preferences = sco_preferences.SemPreferences(context)
     space = sem_preferences.get("feuille_placement_emargement")
     maxlines = sem_preferences.get("feuille_placement_positions")
 
@@ -386,7 +386,7 @@ def do_placement(context, REQUEST):
             + "",
             pdf_title=pdf_title,
             # pdf_shorttitle = '',
-            preferences=context.get_preferences(M["formsemestre_id"]),
+            preferences=sco_preferences.SemPreferences(context, M["formsemestre_id"]),
             # html_generate_cells=False # la derniere ligne (moyennes) est incomplete
         )
         t = tab.make_page(
diff --git a/app/scodoc/sco_portal_apogee.py b/app/scodoc/sco_portal_apogee.py
index 6832ce8ea..996c966c7 100644
--- a/app/scodoc/sco_portal_apogee.py
+++ b/app/scodoc/sco_portal_apogee.py
@@ -55,7 +55,7 @@ class PortalInterface:
 
     def get_portal_url(self, context):
         "URL of portal"
-        portal_url = context.get_preference("portal_url")
+        portal_url = sco_preferences.get_preference(context, "portal_url")
         if not self.warning:
             if portal_url:
                 log("Portal URL=%s" % portal_url)
@@ -66,7 +66,7 @@ class PortalInterface:
 
     def get_etapes_url(self, context):
         "Full URL of service giving list of etapes (in XML)"
-        etapes_url = context.get_preference("etapes_url")
+        etapes_url = sco_preferences.get_preference(context, "etapes_url")
         if not etapes_url:
             # Default:
             portal_url = self.get_portal_url(context)
@@ -81,7 +81,7 @@ class PortalInterface:
 
     def get_etud_url(self, context):
         "Full URL of service giving list of students (in XML)"
-        etud_url = context.get_preference("etud_url")
+        etud_url = sco_preferences.get_preference(context, "etud_url")
         if not etud_url:
             # Default:
             portal_url = self.get_portal_url(context)
@@ -96,7 +96,7 @@ class PortalInterface:
 
     def get_photo_url(self, context):
         "Full URL of service giving photo of student"
-        photo_url = context.get_preference("photo_url")
+        photo_url = sco_preferences.get_preference(context, "photo_url")
         if not photo_url:
             # Default:
             portal_url = self.get_portal_url(context)
@@ -111,7 +111,7 @@ class PortalInterface:
 
     def get_maquette_url(self, context):
         """Full URL of service giving Apogee maquette pour une étape (fichier "CSV")"""
-        maquette_url = context.get_preference("maquette_url")
+        maquette_url = sco_preferences.get_preference(context, "maquette_url")
         if not maquette_url:
             # Default:
             portal_url = self.get_portal_url(context)
@@ -122,7 +122,7 @@ class PortalInterface:
 
     def get_portal_api_version(self, context):
         "API version of the portal software"
-        api_ver = context.get_preference("portal_api")
+        api_ver = sco_preferences.get_preference(context, "portal_api")
         if not api_ver:
             # Default:
             api_ver = 1
@@ -151,7 +151,7 @@ def get_inscrits_etape(context, code_etape, anneeapogee=None, ntrials=2):
     api_ver = get_portal_api_version(context)
     if not etud_url:
         return []
-    portal_timeout = context.get_preference("portal_timeout")
+    portal_timeout = sco_preferences.get_preference(context, "portal_timeout")
     if api_ver > 1:
         req = (
             etud_url
@@ -203,7 +203,7 @@ def query_apogee_portal(context, **args):
             # Ne fonctionne pas avec l'API 2 sur nom et prenom
             # XXX TODO : va poser problème pour la page modif données étudiants : A VOIR
             return []
-    portal_timeout = context.get_preference("portal_timeout")
+    portal_timeout = sco_preferences.get_preference(context, "portal_timeout")
     req = etud_url + "?" + urllib.urlencode(args.items())
     doc = scu.query_portal(req, timeout=portal_timeout)  # sco_utils
     return xml_to_list_of_dicts(doc, req=req)
@@ -323,7 +323,7 @@ def get_etud_apogee(context, code_nip):
     etud_url = get_etud_url(context)
     if not etud_url:
         return {}
-    portal_timeout = context.get_preference("portal_timeout")
+    portal_timeout = sco_preferences.get_preference(context, "portal_timeout")
     req = etud_url + "?" + urllib.urlencode((("nip", code_nip),))
     doc = scu.query_portal(req, timeout=portal_timeout)
     d = _normalize_apo_fields(xml_to_list_of_dicts(doc, req=req))
@@ -356,7 +356,7 @@ def _parse_etapes_from_xml(context, doc):
     """
     may raise exception if invalid xml doc
     """
-    xml_etapes_by_dept = context.get_preference("xml_etapes_by_dept")
+    xml_etapes_by_dept = sco_preferences.get_preference(context, "xml_etapes_by_dept")
     # parser XML
     dom = xml.dom.minidom.parseString(doc)
     infos = {}
@@ -384,7 +384,7 @@ def get_etapes_apogee(context):
     etapes_url = get_etapes_url(context)
     infos = {}
     if etapes_url:
-        portal_timeout = context.get_preference("portal_timeout")
+        portal_timeout = sco_preferences.get_preference(context, "portal_timeout")
         log(
             "get_etapes_apogee: requesting '%s' with timeout=%s"
             % (etapes_url, portal_timeout)
@@ -432,9 +432,9 @@ def get_etapes_apogee_dept(context):
 
     Returns [ ( code, intitule) ], ordonnée
     """
-    xml_etapes_by_dept = context.get_preference("xml_etapes_by_dept")
+    xml_etapes_by_dept = sco_preferences.get_preference(context, "xml_etapes_by_dept")
     if xml_etapes_by_dept:
-        portal_dept_name = context.get_preference("portal_dept_name")
+        portal_dept_name = sco_preferences.get_preference(context, "portal_dept_name")
         log('get_etapes_apogee_dept: portal_dept_name="%s"' % portal_dept_name)
     else:
         portal_dept_name = ""
@@ -558,7 +558,7 @@ def get_maquette_apogee(context, etape="", annee_scolaire=""):
     maquette_url = get_maquette_url(context)
     if not maquette_url:
         return None
-    portal_timeout = context.get_preference("portal_timeout")
+    portal_timeout = sco_preferences.get_preference(context, "portal_timeout")
     req = (
         maquette_url
         + "?"
diff --git a/app/scodoc/sco_poursuite_dut.py b/app/scodoc/sco_poursuite_dut.py
index 86c6779cc..eee2e6694 100644
--- a/app/scodoc/sco_poursuite_dut.py
+++ b/app/scodoc/sco_poursuite_dut.py
@@ -203,7 +203,7 @@ def formsemestre_poursuite_report(
         html_sortable=True,
         html_class="table_leftalign table_listegroupe",
         pdf_link=False,  # pas d'export pdf
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
     )
     tab.filename = scu.make_filename("poursuite " + sem["titreannee"])
 
diff --git a/app/scodoc/sco_preferences.py b/app/scodoc/sco_preferences.py
index 19135774c..22887322a 100644
--- a/app/scodoc/sco_preferences.py
+++ b/app/scodoc/sco_preferences.py
@@ -79,18 +79,18 @@ des tuples (name, value, formsemestre_id).
 Si formsemestre_id est NULL, la valeur concerne tous les semestres,
 sinon, elle ne concerne que le semestre indiqué. 
 
-* Utilisation dans ScoDoc
+* Utilisation dans ScoDoc7
   - lire une valeur: 
-      context.get_preference(name, formsemestre_id)
+      get_preference(context, name, formsemestre_id)
       nb: les valeurs sont des chaines, sauf:
          . si le type est spécfié (float ou int)
          . les boolcheckbox qui sont des entiers 0 ou 1
   - avoir un mapping (read only) de toutes les valeurs:
-      context.get_preferences(formsemestre_id)
+      sco_preferences.SemPreferences(context,formsemestre_id)
   - editer les preferences globales:
       sco_preferences.get_base_preferences(self).edit(REQUEST=REQUEST)
   - editer les preferences d'un semestre:
-      sem_preferences(context,formsemestre_id).edit()
+      SemPreferences(context,formsemestre_id).edit()
 
 * Implémentation: sco_preferences.py
 
@@ -109,7 +109,7 @@ Une instance unique par site (département, repéré par URL).
  .deleteformsemestre_id, name)
  .edit() (HTML dialog)
 
-class sem_preferences(context,formsemestre_id)
+class SemPreferences(context,formsemestre_id)
 Une instance par semestre, et une instance pour prefs globales.
 L'attribut .base_prefs point sur sco_base_preferences.
  .__getitem__   [name]
@@ -1956,7 +1956,9 @@ class sco_base_preferences:
             submitlabel="Enregistrer les modifications",
         )
         if tf[0] == 0:
-            return "\n".join(H) + tf[1] + self.html_sco_header.sco_footer(context, REQUEST)
+            return (
+                "\n".join(H) + tf[1] + self.html_sco_header.sco_footer(context, REQUEST)
+            )
         elif tf[0] == -1:
             return REQUEST.RESPONSE.redirect(self.context.ScoURL())  # cancel
         else:
@@ -1979,7 +1981,7 @@ def get_base_preferences(context):
     return _SCO_BASE_PREFERENCES[u]
 
 
-class sem_preferences:
+class SemPreferences:
     def __init__(self, context, formsemestre_id=None):
         self.context = context
         self.formsemestre_id = formsemestre_id
@@ -2065,7 +2067,9 @@ function set_global_pref(el, pref_name) {
             + "/formsemestre_status?formsemestre_id=%s" % self.formsemestre_id
         )
         if tf[0] == 0:
-            return "\n".join(H) + tf[1] + self.html_sco_header.sco_footer(context, REQUEST)
+            return (
+                "\n".join(H) + tf[1] + self.html_sco_header.sco_footer(context, REQUEST)
+            )
         elif tf[0] == -1:
             return REQUEST.RESPONSE.redirect(
                 dest_url + "&head_message=Annulé"
@@ -2183,6 +2187,13 @@ def _build_form(self, categories=[], global_edit=False):
     return form
 
 
+def get_preference(context, name, formsemestre_id=None):
+    """Returns value of named preference.
+    All preferences have a sensible default value, so this function always returns a usable value for all defined preferences names.
+    """
+    return get_base_preferences(context).get(formsemestre_id, name)
+
+
 #
 def doc_preferences(context):
     """ Liste les preferences en MarkDown, pour la documentation"""
diff --git a/app/scodoc/sco_prepajury.py b/app/scodoc/sco_prepajury.py
index 82e60819b..14f69c414 100644
--- a/app/scodoc/sco_prepajury.py
+++ b/app/scodoc/sco_prepajury.py
@@ -161,9 +161,9 @@ def feuille_preparation_jury(context, formsemestre_id, REQUEST):
     L.append([])  # empty line
 
     titles = ["Rang"]
-    if context.get_preference("prepa_jury_nip"):
+    if sco_preferences.get_preference(context, "prepa_jury_nip"):
         titles.append("NIP")
-    if context.get_preference("prepa_jury_ine"):
+    if sco_preferences.get_preference(context, "prepa_jury_ine"):
         titles.append("INE")
     titles += [
         "etudid",
@@ -223,9 +223,9 @@ def feuille_preparation_jury(context, formsemestre_id, REQUEST):
     for etudid in etudids:
         etud = nt.identdict[etudid]
         l = [str(i)]
-        if context.get_preference("prepa_jury_nip"):
+        if sco_preferences.get_preference(context, "prepa_jury_nip"):
             l.append(etud["code_nip"])
-        if context.get_preference("prepa_jury_ine"):
+        if sco_preferences.get_preference(context, "prepa_jury_ine"):
             l.append(etud["code_ine"])
         l += [
             etudid,
diff --git a/app/scodoc/sco_pvjury.py b/app/scodoc/sco_pvjury.py
index 5bbb62888..8365227d1 100644
--- a/app/scodoc/sco_pvjury.py
+++ b/app/scodoc/sco_pvjury.py
@@ -412,10 +412,10 @@ def pvjury_table(
         columns_ids += ["prev_decision"]
 
     columns_ids += ["decision"]
-    if context.get_preference("bul_show_mention", formsemestre_id):
+    if sco_preferences.get_preference(context, "bul_show_mention", formsemestre_id):
         columns_ids += ["mention"]
     columns_ids += ["ue_cap"]
-    if context.get_preference("bul_show_ects", formsemestre_id):
+    if sco_preferences.get_preference(context, "bul_show_ects", formsemestre_id):
         columns_ids += ["ects"]
 
     # XXX if not dpv["semestre_non_terminal"]:
@@ -448,11 +448,11 @@ def pvjury_table(
         }
         if with_paragraph_nom:
             cell_style = styles.ParagraphStyle({})
-            cell_style.fontSize = context.get_preference(
+            cell_style.fontSize = sco_preferences.get_preference(context, 
                 "SCOLAR_FONT_SIZE", formsemestre_id
             )
-            cell_style.fontName = context.get_preference("PV_FONTNAME", formsemestre_id)
-            cell_style.leading = 1.0 * context.get_preference(
+            cell_style.fontName = sco_preferences.get_preference(context, "PV_FONTNAME", formsemestre_id)
+            cell_style.leading = 1.0 * sco_preferences.get_preference(context, 
                 "SCOLAR_FONT_SIZE", formsemestre_id
             )  # vertical space
             i = e["identite"]
@@ -528,7 +528,7 @@ def formsemestre_pvjury(
         caption="Décisions jury pour " + sem["titreannee"],
         html_class="table_leftalign",
         html_sortable=True,
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
     )
     if format != "html":
         return tab.make_page(
@@ -540,7 +540,8 @@ def formsemestre_pvjury(
         )
     tab.base_url = "%s?formsemestre_id=%s" % (REQUEST.URL0, formsemestre_id)
     H = [
-        html_sco_header.html_sem_header(context, 
+        html_sco_header.html_sem_header(
+            context,
             REQUEST,
             "Décisions du jury pour le semestre",
             sem,
@@ -589,7 +590,7 @@ def formsemestre_pvjury(
             columns_ids=("code", "count", "expl"),
             html_class="table_leftalign",
             html_sortable=True,
-            preferences=context.get_preferences(formsemestre_id),
+            preferences=sco_preferences.SemPreferences(context, formsemestre_id),
         ).html()
     )
     H.append("<p></p>")  # force space at bottom
@@ -629,7 +630,8 @@ def formsemestre_pvjury_pdf(
         etudids = [m["etudid"] for m in groups_infos.members]
 
     H = [
-        html_sco_header.html_sem_header(context, 
+        html_sco_header.html_sem_header(
+            context,
             REQUEST,
             "Edition du PV de jury %s" % etuddescr,
             sem=sem,
@@ -811,7 +813,8 @@ def formsemestre_lettres_individuelles(
     etudids = [m["etudid"] for m in groups_infos.members]
 
     H = [
-        html_sco_header.html_sem_header(context, 
+        html_sco_header.html_sem_header(
+            context,
             REQUEST,
             "Edition des lettres individuelles",
             sem=sem,
diff --git a/app/scodoc/sco_pvpdf.py b/app/scodoc/sco_pvpdf.py
index dcccb6c6c..0362ff841 100644
--- a/app/scodoc/sco_pvpdf.py
+++ b/app/scodoc/sco_pvpdf.py
@@ -348,7 +348,7 @@ def pdf_lettres_individuelles(
     context.fillEtudsInfo(etuds)
     #
     sem = sco_formsemestre.get_formsemestre(context, formsemestre_id)
-    prefs = context.get_preferences(formsemestre_id)
+    prefs = sco_preferences.SemPreferences(context, formsemestre_id)
     params = {
         "date_jury": date_jury,
         "date_commission": date_commission,
@@ -358,7 +358,7 @@ def pdf_lettres_individuelles(
     }
     # copie preferences
     for name in sco_preferences.PREFS_NAMES:
-        params[name] = context.get_preference(name, sem["formsemestre_id"])
+        params[name] = sco_preferences.get_preference(context, name, sem["formsemestre_id"])
 
     bookmarks = {}
     objects = []  # list of PLATYPUS objects
@@ -429,7 +429,7 @@ def pdf_lettre_individuelle(sem, decision, etud, params, signature=None, context
     objects = []
     style = reportlab.lib.styles.ParagraphStyle({})
     style.fontSize = 14
-    style.fontName = context.get_preference("PV_FONTNAME", formsemestre_id)
+    style.fontName = sco_preferences.get_preference(context, "PV_FONTNAME", formsemestre_id)
     style.leading = 18
     style.alignment = TA_JUSTIFY
 
@@ -443,7 +443,7 @@ def pdf_lettre_individuelle(sem, decision, etud, params, signature=None, context
     else:
         params["decisions_ue_descr_plural"] = ""
 
-    params["INSTITUTION_CITY"] = context.get_preference(
+    params["INSTITUTION_CITY"] = sco_preferences.get_preference(context, 
         "INSTITUTION_CITY", formsemestre_id
     )
     if decision["prev_decision_sem"]:
@@ -512,7 +512,7 @@ def pdf_lettre_individuelle(sem, decision, etud, params, signature=None, context
     # Corps de la lettre:
     objects += sco_bulletins_pdf.process_field(
         context,
-        context.get_preference("PV_LETTER_TEMPLATE", sem["formsemestre_id"]),
+        sco_preferences.get_preference(context, "PV_LETTER_TEMPLATE", sem["formsemestre_id"]),
         params,
         style,
         suppress_empty_pars=True,
@@ -523,7 +523,7 @@ def pdf_lettre_individuelle(sem, decision, etud, params, signature=None, context
     # chef de département.
     if Se.semestre_non_terminal:
         sig = (
-            context.get_preference("PV_LETTER_PASSAGE_SIGNATURE", formsemestre_id)
+            sco_preferences.get_preference(context, "PV_LETTER_PASSAGE_SIGNATURE", formsemestre_id)
             % params
         )
         sig = _simulate_br(sig, '<para leftindent="%(htab1)s">')
@@ -538,7 +538,7 @@ def pdf_lettre_individuelle(sem, decision, etud, params, signature=None, context
         )
     else:
         sig = (
-            context.get_preference("PV_LETTER_DIPLOMA_SIGNATURE", formsemestre_id)
+            sco_preferences.get_preference(context, "PV_LETTER_DIPLOMA_SIGNATURE", formsemestre_id)
             % params
         )
         sig = _simulate_br(sig, '<para leftindent="%(htab1)s">')
@@ -580,12 +580,12 @@ def _make_signature_image(signature, leftindent, formsemestre_id, context=None):
     im = PILImage.open(f)
     width, height = im.size
     pdfheight = (
-        1.0 * context.get_preference("pv_sig_image_height", formsemestre_id) * mm
+        1.0 * sco_preferences.get_preference(context, "pv_sig_image_height", formsemestre_id) * mm
     )
     f.seek(0, 0)
 
     style = styles.ParagraphStyle({})
-    style.leading = 1.0 * context.get_preference(
+    style.leading = 1.0 * sco_preferences.get_preference(context, 
         "SCOLAR_FONT_SIZE", formsemestre_id
     )  # vertical space
     style.leftIndent = leftindent
@@ -666,7 +666,7 @@ def pvjury_pdf(
             author="%s %s (E. Viennet)" % (VERSION.SCONAME, VERSION.SCOVERSION),
             title=SU("PV du jury de %s" % sem["titre_num"]),
             subject="PV jury",
-            preferences=context.get_preferences(formsemestre_id),
+            preferences=sco_preferences.SemPreferences(context, formsemestre_id),
         )
     )
 
@@ -702,14 +702,14 @@ def _pvjury_pdf_type(
 
     style = reportlab.lib.styles.ParagraphStyle({})
     style.fontSize = 12
-    style.fontName = context.get_preference("PV_FONTNAME", formsemestre_id)
+    style.fontName = sco_preferences.get_preference(context, "PV_FONTNAME", formsemestre_id)
     style.leading = 18
     style.alignment = TA_JUSTIFY
 
     indent = 1 * cm
     bulletStyle = reportlab.lib.styles.ParagraphStyle({})
     bulletStyle.fontSize = 12
-    bulletStyle.fontName = context.get_preference("PV_FONTNAME", formsemestre_id)
+    bulletStyle.fontName = sco_preferences.get_preference(context, "PV_FONTNAME", formsemestre_id)
     bulletStyle.leading = 12
     bulletStyle.alignment = TA_JUSTIFY
     bulletStyle.firstLineIndent = 0
@@ -727,7 +727,7 @@ def _pvjury_pdf_type(
     """
         % (
             titre_jury,
-            context.get_preference("DeptName", formsemestre_id),
+            sco_preferences.get_preference(context, "DeptName", formsemestre_id),
             sem["anneescolaire"],
         ),
         style,
@@ -745,7 +745,7 @@ def _pvjury_pdf_type(
         objects += sco_pdf.makeParas(
             """<para align="center"><b>Semestre: %s</b></para>""" % sem["titre"], style
         )
-    if context.get_preference("PV_TITLE_WITH_VDI", formsemestre_id):
+    if sco_preferences.get_preference(context, "PV_TITLE_WITH_VDI", formsemestre_id):
         objects += sco_pdf.makeParas(
             """<para align="center">VDI et Code: %s</para>""" % (VDICode or ""), style
         )
@@ -757,11 +757,11 @@ def _pvjury_pdf_type(
 
     objects += sco_pdf.makeParas(
         "<para>"
-        + context.get_preference("PV_INTRO", formsemestre_id)
+        + sco_preferences.get_preference(context, "PV_INTRO", formsemestre_id)
         % {
             "Decnum": numeroArrete,
             "VDICode": VDICode,
-            "UnivName": context.get_preference("UnivName", formsemestre_id),
+            "UnivName": sco_preferences.get_preference(context, "UnivName", formsemestre_id),
             "Type": titre_jury,
             "Date": date_commission,  # deprecated
             "date_commission": date_commission,
@@ -787,9 +787,9 @@ def _pvjury_pdf_type(
     titles = [titles.get(x, "") for x in columns_ids]
     # Make a new cell style and put all cells in paragraphs
     cell_style = styles.ParagraphStyle({})
-    cell_style.fontSize = context.get_preference("SCOLAR_FONT_SIZE", formsemestre_id)
-    cell_style.fontName = context.get_preference("PV_FONTNAME", formsemestre_id)
-    cell_style.leading = 1.0 * context.get_preference(
+    cell_style.fontSize = sco_preferences.get_preference(context, "SCOLAR_FONT_SIZE", formsemestre_id)
+    cell_style.fontName = sco_preferences.get_preference(context, "PV_FONTNAME", formsemestre_id)
+    cell_style.leading = 1.0 * sco_preferences.get_preference(context, 
         "SCOLAR_FONT_SIZE", formsemestre_id
     )  # vertical space
     LINEWIDTH = 0.5
@@ -798,7 +798,7 @@ def _pvjury_pdf_type(
             "FONTNAME",
             (0, 0),
             (-1, 0),
-            context.get_preference("PV_FONTNAME", formsemestre_id),
+            sco_preferences.get_preference(context, "PV_FONTNAME", formsemestre_id),
         ),
         ("LINEBELOW", (0, 0), (-1, 0), LINEWIDTH, Color(0, 0, 0)),
         ("GRID", (0, 0), (-1, -1), LINEWIDTH, Color(0, 0, 0)),
@@ -817,7 +817,7 @@ def _pvjury_pdf_type(
     widths = [6 * cm, 2.8 * cm, 2.8 * cm, None, None, None, None]
     if dpv["has_prev"]:
         widths[2:2] = [2.8 * cm]
-    if context.get_preference("bul_show_mention", formsemestre_id):
+    if sco_preferences.get_preference(context, "bul_show_mention", formsemestre_id):
         widths += [None]
     objects.append(Table(Pt, repeatRows=1, colWidths=widths, style=table_style))
 
@@ -826,8 +826,8 @@ def _pvjury_pdf_type(
         """<para spaceBefore="10mm" align="right">
         %s, %s</para>"""
         % (
-            context.get_preference("DirectorName", formsemestre_id) or "",
-            context.get_preference("DirectorTitle", formsemestre_id) or "",
+            sco_preferences.get_preference(context, "DirectorName", formsemestre_id) or "",
+            sco_preferences.get_preference(context, "DirectorTitle", formsemestre_id) or "",
         ),
         style,
     )
@@ -848,7 +848,7 @@ def _pvjury_pdf_type(
             "FONTNAME",
             (0, 0),
             (-1, 0),
-            context.get_preference("PV_FONTNAME", formsemestre_id),
+            sco_preferences.get_preference(context, "PV_FONTNAME", formsemestre_id),
         ),
         ("LINEBELOW", (0, 0), (-1, -1), LINEWIDTH, Color(0, 0, 0)),
         ("LINEABOVE", (0, 0), (-1, -1), LINEWIDTH, Color(0, 0, 0)),
diff --git a/app/scodoc/sco_recapcomplet.py b/app/scodoc/sco_recapcomplet.py
index dad79d91e..40a27f2fa 100644
--- a/app/scodoc/sco_recapcomplet.py
+++ b/app/scodoc/sco_recapcomplet.py
@@ -75,7 +75,7 @@ def formsemestre_recapcomplet(
     )  # cache les colonnes des modules
     pref_override = int(pref_override)
     if pref_override:
-        hidebac = int(context.get_preference("recap_hidebac", formsemestre_id))
+        hidebac = int(sco_preferences.get_preference(context, "recap_hidebac", formsemestre_id))
     else:
         hidebac = int(hidebac)
     xml_with_decisions = int(xml_with_decisions)
@@ -177,7 +177,7 @@ def formsemestre_recapcomplet(
                     % formsemestre_id
                 )
             H.append("</p>")
-        if context.get_preference("use_ue_coefs", formsemestre_id):
+        if sco_preferences.get_preference(context, "use_ue_coefs", formsemestre_id):
             H.append(
                 """
             <p class="infop">utilise les coefficients d'UE pour calculer la moyenne générale.</p>
@@ -486,7 +486,7 @@ def make_formsemestre_recapcomplet(
                 if key == "nb_valid_evals":
                     l.append("")
                 elif key == "coef":
-                    if context.get_preference("use_ue_coefs", formsemestre_id):
+                    if sco_preferences.get_preference(context, "use_ue_coefs", formsemestre_id):
                         l.append("%2.3f" % ue["coefficient"])
                     else:
                         l.append("")
diff --git a/app/scodoc/sco_report.py b/app/scodoc/sco_report.py
index ce5cd8fb3..0f1483dca 100644
--- a/app/scodoc/sco_report.py
+++ b/app/scodoc/sco_report.py
@@ -192,7 +192,7 @@ def _results_by_category(
         bottom_titles=bottom_titles,
         html_col_width="4em",
         html_sortable=True,
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
     )
 
 
@@ -643,7 +643,7 @@ def table_suivi_cohorte(
         caption="Suivi cohorte " + pp + sem["titreannee"] + dbac,
         page_title="Suivi cohorte " + sem["titreannee"],
         html_class="table_cohorte",
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
     )
     # Explication: liste des semestres associés à chaque date
     if not P:
@@ -1155,7 +1155,7 @@ def table_suivi_parcours(
             "nb": len(etuds),
             "codeparcours": len(etuds),
         },
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
     )
     return tab
 
@@ -1215,7 +1215,8 @@ def formsemestre_suivi_parcours(
     ]
 
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title=tab.page_title,
             init_qtip=True,
@@ -1543,7 +1544,8 @@ def formsemestre_graph_parcours(
         )
 
         H = [
-            html_sco_header.sco_header(context, 
+            html_sco_header.sco_header(
+                context,
                 REQUEST,
                 page_title="Parcours étudiants de %(titreannee)s" % sem,
                 no_side_bar=True,
diff --git a/app/scodoc/sco_semset.py b/app/scodoc/sco_semset.py
index b70784db6..e83d93e54 100644
--- a/app/scodoc/sco_semset.py
+++ b/app/scodoc/sco_semset.py
@@ -459,14 +459,17 @@ def semset_page(context, format="html", REQUEST=None):
         html_sortable=True,
         html_class="table_leftalign",
         filename="semsets",
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
     if format != "html":
         return tab.make_page(context, format=format, REQUEST=REQUEST)
 
     page_title = "Ensembles de semestres"
     H = [
-        html_sco_header.sco_header(context, 
+        html_sco_header.sco_header(
+            context,
             REQUEST,
             page_title=page_title,
             init_qtip=True,
diff --git a/app/scodoc/sco_trombino.py b/app/scodoc/sco_trombino.py
index 3dac4de7c..6d54834a9 100644
--- a/app/scodoc/sco_trombino.py
+++ b/app/scodoc/sco_trombino.py
@@ -242,7 +242,9 @@ def trombino_copy_photos(context, group_ids=[], REQUEST=None, dialog_confirmed=F
     back_url = "groups_view?%s&curtab=tab-photos" % groups_infos.groups_query_args
 
     portal_url = sco_portal_apogee.get_portal_url(context)
-    header = html_sco_header.sco_header(context, REQUEST, page_title="Chargement des photos")
+    header = html_sco_header.sco_header(
+        context, REQUEST, page_title="Chargement des photos"
+    )
     footer = html_sco_header.sco_footer(context, REQUEST)
     if not portal_url:
         return (
@@ -374,7 +376,7 @@ def _trombino_pdf(context, groups_infos, REQUEST):
         sco_pdf.ScolarsPageTemplate(
             document,
             context=context,
-            preferences=context.get_preferences(sem["formsemestre_id"]),
+            preferences=sco_preferences.SemPreferences(context, sem["formsemestre_id"]),
         )
     )
     document.build(objects)
@@ -451,7 +453,7 @@ def _listeappel_photos_pdf(context, groups_infos, REQUEST):
         sco_pdf.ScolarsPageTemplate(
             document,
             context,
-            preferences=context.get_preferences(sem["formsemestre_id"]),
+            preferences=sco_preferences.SemPreferences(context, sem["formsemestre_id"]),
         )
     )
     document.build(objects)
@@ -490,7 +492,9 @@ def photos_import_files_form(context, group_ids=[], REQUEST=None):
     back_url = "groups_view?%s&curtab=tab-photos" % groups_infos.groups_query_args
 
     H = [
-        html_sco_header.sco_header(context, REQUEST, page_title="Import des photos des étudiants"),
+        html_sco_header.sco_header(
+            context, REQUEST, page_title="Import des photos des étudiants"
+        ),
         """<h2 class="formsemestre">Téléchargement des photos des étudiants</h2>
          <p><b>Vous pouvez aussi charger les photos individuellement via la fiche de chaque étudiant (menu "Etudiant" / "Changer la photo").</b></p>
          <p class="help">Cette page permet de charger en une seule fois les photos de plusieurs étudiants.<br/>
diff --git a/app/scodoc/sco_trombino_tours.py b/app/scodoc/sco_trombino_tours.py
index 4f2cd7806..27dbea07a 100644
--- a/app/scodoc/sco_trombino_tours.py
+++ b/app/scodoc/sco_trombino_tours.py
@@ -72,10 +72,10 @@ def pdf_trombino_tours(
         context, group_ids, formsemestre_id=formsemestre_id, REQUEST=REQUEST
     )
 
-    DeptName = context.get_preference("DeptName")
-    DeptFullName = context.get_preference("DeptFullName")
-    UnivName = context.get_preference("UnivName")
-    InstituteName = context.get_preference("InstituteName")
+    DeptName = sco_preferences.get_preference(context, "DeptName")
+    DeptFullName = sco_preferences.get_preference(context, "DeptFullName")
+    UnivName = sco_preferences.get_preference(context, "UnivName")
+    InstituteName = sco_preferences.get_preference(context, "InstituteName")
     # Generate PDF page
     StyleSheet = styles.getSampleStyleSheet()
     objects = []
@@ -277,7 +277,11 @@ def pdf_trombino_tours(
     document = BaseDocTemplate(report)
     document.addPageTemplates(
         ScolarsPageTemplate(
-            document, context=context, preferences=context.get_preferences()
+            document,
+            context=context,
+            preferences=sco_preferences.SemPreferences(
+                context,
+            ),
         )
     )
     document.build(objects)
@@ -297,10 +301,10 @@ def pdf_feuille_releve_absences(
 ):
     """Generation de la feuille d'absence en fichier PDF, avec photos"""
 
-    NB_CELL_AM = context.get_preference("feuille_releve_abs_AM")
-    NB_CELL_PM = context.get_preference("feuille_releve_abs_PM")
+    NB_CELL_AM = sco_preferences.get_preference(context, "feuille_releve_abs_AM")
+    NB_CELL_PM = sco_preferences.get_preference(context, "feuille_releve_abs_PM")
     COLWIDTH = 0.85 * cm
-    if context.get_preference("feuille_releve_abs_samedi"):
+    if sco_preferences.get_preference(context, "feuille_releve_abs_samedi"):
         days = sco_abs.DAYNAMES[:6]  # Lundi, ..., Samedi
     else:
         days = sco_abs.DAYNAMES[:5]  # Lundi, ..., Vendredi
@@ -311,10 +315,10 @@ def pdf_feuille_releve_absences(
         context, group_ids, formsemestre_id=formsemestre_id, REQUEST=REQUEST
     )
 
-    DeptName = context.get_preference("DeptName")
-    DeptFullName = context.get_preference("DeptFullName")
-    UnivName = context.get_preference("UnivName")
-    InstituteName = context.get_preference("InstituteName")
+    DeptName = sco_preferences.get_preference(context, "DeptName")
+    DeptFullName = sco_preferences.get_preference(context, "DeptFullName")
+    UnivName = sco_preferences.get_preference(context, "UnivName")
+    InstituteName = sco_preferences.get_preference(context, "InstituteName")
     # Generate PDF page
     StyleSheet = styles.getSampleStyleSheet()
     objects = [
@@ -461,17 +465,21 @@ def pdf_feuille_releve_absences(
     # Build document
     report = StringIO()  # in-memory document, no disk file
     filename = "absences-%s-%s.pdf" % (DeptName, groups_infos.groups_filename)
-    if context.get_preference("feuille_releve_abs_taille") == "A3":
+    if sco_preferences.get_preference(context, "feuille_releve_abs_taille") == "A3":
         taille = A3
-    elif context.get_preference("feuille_releve_abs_taille") == "A4":
+    elif sco_preferences.get_preference(context, "feuille_releve_abs_taille") == "A4":
         taille = A4
-    if context.get_preference("feuille_releve_abs_format") == "Paysage":
+    if sco_preferences.get_preference(context, "feuille_releve_abs_format") == "Paysage":
         document = BaseDocTemplate(report, pagesize=landscape(taille))
     else:
         document = BaseDocTemplate(report, pagesize=taille)
     document.addPageTemplates(
         ScolarsPageTemplate(
-            document, context=context, preferences=context.get_preferences()
+            document,
+            context=context,
+            preferences=sco_preferences.SemPreferences(
+                context,
+            ),
         )
     )
     document.build(objects)
diff --git a/app/scodoc/sco_undo_notes.py b/app/scodoc/sco_undo_notes.py
index 5d3fe163d..6de1c8187 100644
--- a/app/scodoc/sco_undo_notes.py
+++ b/app/scodoc/sco_undo_notes.py
@@ -157,7 +157,7 @@ def evaluation_list_operations(context, REQUEST, evaluation_id):
         html_sortable=False,
         html_title="<h2>Opérations sur l'évaluation %s du %s</h2>"
         % (E["description"], E["jour"]),
-        preferences=context.get_preferences(M["formsemestre_id"]),
+        preferences=sco_preferences.SemPreferences(context, M["formsemestre_id"]),
     )
     return tab.make_page(context, REQUEST=REQUEST)
 
@@ -200,7 +200,7 @@ def formsemestre_list_saisies_notes(
         html_class="table_leftalign table_coldate",
         html_sortable=True,
         caption="Saisies de notes dans %s" % sem["titreannee"],
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
         base_url="%s?formsemestre_id=%s" % (REQUEST.URL0, formsemestre_id),
         origin="Généré par %s le " % VERSION.SCONAME + scu.timedate_human_repr() + "",
     )
diff --git a/app/scodoc/sco_utils.py b/app/scodoc/sco_utils.py
index 6b70a0b16..9ae80124b 100644
--- a/app/scodoc/sco_utils.py
+++ b/app/scodoc/sco_utils.py
@@ -936,6 +936,10 @@ def confirm_dialog(
     if helpmsg:
         H.append('<p class="help">' + helpmsg + "</p>")
     if add_headers and REQUEST:
-        return html_sco_header.sco_header(context, REQUEST) + "\n".join(H) + html_sco_header.sco_footer(context, REQUEST)
+        return (
+            html_sco_header.sco_header(context, REQUEST)
+            + "\n".join(H)
+            + html_sco_header.sco_footer(context, REQUEST)
+        )
     else:
         return "\n".join(H)
diff --git a/app/scodoc/scolars.py b/app/scodoc/scolars.py
index 21f8c92aa..bc19d19c1 100644
--- a/app/scodoc/scolars.py
+++ b/app/scodoc/scolars.py
@@ -385,7 +385,7 @@ def identite_edit(cnx, args, context=None, REQUEST=None):
     notify_to = None
     if context:
         try:
-            notify_to = context.get_preference("notify_etud_changes_to")
+            notify_to = sco_preferences.get_preference(context, "notify_etud_changes_to")
         except:
             pass
 
@@ -452,7 +452,7 @@ def notify_etud_change(context, email_addr, etud, before, after, subject):
     msg = MIMEMultipart()
     subj = Header("[ScoDoc] " + subject, SCO_ENCODING)
     msg["Subject"] = subj
-    msg["From"] = context.get_preference("email_from_addr")
+    msg["From"] = sco_preferences.get_preference(context, "email_from_addr")
     msg["To"] = email_addr
     mime_txt = MIMEText(txt, "plain", SCO_ENCODING)
     msg.attach(mime_txt)
@@ -498,7 +498,7 @@ def adresse_edit(cnx, args, context=None):
     notify_to = None
     if context:
         try:
-            notify_to = context.get_preference("notify_etud_changes_to")
+            notify_to = sco_preferences.get_preference(context, "notify_etud_changes_to")
         except:
             pass
     if notify_to:
diff --git a/app/views/absences.py b/app/views/absences.py
index 39c0fc796..0bebf0ea1 100644
--- a/app/views/absences.py
+++ b/app/views/absences.py
@@ -718,7 +718,7 @@ def SignaleAbsenceGrHebdo(
     )
 
     formsemestre_id = groups_infos.formsemestre_id
-    require_module = context.get_preference("abs_require_module", formsemestre_id)
+    require_module = sco_preferences.get_preference(context, "abs_require_module", formsemestre_id)
     etuds = [
         context.getEtudInfo(etudid=m["etudid"], filled=True)[0]
         for m in groups_infos.members
@@ -880,7 +880,7 @@ def SignaleAbsenceGrSemestre(
             + context.sco_footer(REQUEST)
         )
     formsemestre_id = groups_infos.formsemestre_id
-    require_module = context.get_preference("abs_require_module", formsemestre_id)
+    require_module = sco_preferences.get_preference(context, "abs_require_module", formsemestre_id)
     etuds = [
         context.getEtudInfo(etudid=m["etudid"], filled=True)[0]
         for m in groups_infos.members
@@ -1444,7 +1444,7 @@ def EtatAbsencesGr(
     tab = GenTable(
         columns_ids=columns_ids,
         rows=T,
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
         titles={
             "etatincursem": "Etat",
             "nomprenom": "Nom",
@@ -1745,7 +1745,9 @@ def _tableBillets(context, billets, etud=None, title=""):
         columns_ids=columns_ids,
         page_title=title,
         html_title="<h2>%s</h2>" % title,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
         rows=billets,
         html_sortable=True,
     )
@@ -1773,7 +1775,7 @@ def listeBilletsEtud(context, etudid=False, REQUEST=None, format="html"):
 @scodoc7func(context)
 def XMLgetBilletsEtud(context, etudid=False, REQUEST=None):
     """Liste billets pour un etudiant"""
-    if not context.get_preference("handle_billets_abs"):
+    if not sco_preferences.get_preference(context, "handle_billets_abs"):
         return ""
     t0 = time.time()
     r = context.listeBilletsEtud(etudid, REQUEST=REQUEST, format="xml")
diff --git a/app/views/notes.py b/app/views/notes.py
index 26c57eab2..9ab5e747b 100644
--- a/app/views/notes.py
+++ b/app/views/notes.py
@@ -1574,7 +1574,9 @@ def view_module_abs(context, REQUEST, moduleimpl_id, format="html"):
         base_url="%s?moduleimpl_id=%s" % (REQUEST.URL0, moduleimpl_id),
         filename="absmodule_" + scu.make_filename(M["module"]["titre"]),
         caption="Absences dans le module %s" % M["module"]["titre"],
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
 
     if format != "html":
@@ -1732,7 +1734,7 @@ def formsemestre_enseignants_list(context, REQUEST, formsemestre_id, format="htm
         ),
         base_url="%s?formsemestre_id=%s" % (REQUEST.URL0, formsemestre_id),
         caption="Tous les enseignants (responsables ou associés aux modules de ce semestre) apparaissent. Le nombre de saisies d'absences est le nombre d'opérations d'ajout effectuées sur ce semestre, sans tenir compte des annulations ou double saisies.",
-        preferences=context.get_preferences(formsemestre_id),
+        preferences=sco_preferences.SemPreferences(context, formsemestre_id),
     )
     return T.make_page(
         context, page_title=title, title=title, REQUEST=REQUEST, format=format
diff --git a/app/views/scolar.py b/app/views/scolar.py
index 4b4e17ed4..9a7251de1 100644
--- a/app/views/scolar.py
+++ b/app/views/scolar.py
@@ -235,9 +235,9 @@ def formsemestre_edit_preferences(context, formsemestre_id, REQUEST):
         or ((str(authuser) in sem["responsables"]) and sem["resp_can_edit"])
     ) and (sem["etat"] == "1")
     if ok:
-        return context.get_preferences(formsemestre_id=formsemestre_id).edit(
-            REQUEST=REQUEST
-        )
+        return sco_preferences.SemPreferences(
+            context, formsemestre_id=formsemestre_id
+        ).edit(REQUEST=REQUEST)
     else:
         raise AccessDenied("Modification impossible pour %s" % authuser)
 
@@ -285,7 +285,9 @@ def showEtudLog(context, etudid, format="html", REQUEST=None):
         filename="log_" + scu.make_filename(etud["nomprenom"]),
         html_next_section='<ul><li><a href="ficheEtud?etudid=%(etudid)s">fiche de %(nomprenom)s</a></li></ul>'
         % etud,
-        preferences=context.get_preferences(),
+        preferences=sco_preferences.SemPreferences(
+            context,
+        ),
     )
 
     return tab.make_page(context, format=format, REQUEST=REQUEST)
@@ -302,7 +304,7 @@ def rssnews(context, REQUEST=None):
     "rss feed"
     REQUEST.RESPONSE.setHeader("content-type", scu.XML_MIMETYPE)
     return sco_news.scolar_news_summary_rss(
-        context, "Nouvelles de " + context.get_preference("DeptName"), context.ScoURL()
+        context, "Nouvelles de " + sco_preferences.get_preference(context, "DeptName"), context.ScoURL()
     )
 
 
@@ -1181,7 +1183,7 @@ def _etudident_create_or_edit_form(context, REQUEST, edit):
     else:
         A = """<div class="infoapogee"><p>Pas d'informations d'Apogée</p></div>"""
 
-    require_ine = context.get_preference("always_require_ine")
+    require_ine = sco_preferences.get_preference(context, "always_require_ine")
 
     descr += [
         ("adm_id", {"input_type": "hidden"}),
diff --git a/scotests/test-all-moys.py b/scotests/test-all-moys.py
index e9da8d873..7471539fd 100644
--- a/scotests/test-all-moys.py
+++ b/scotests/test-all-moys.py
@@ -25,7 +25,9 @@ for sem in sems:
     formsemestre_id = sem["formsemestre_id"]
     nt = context.Notes._getNotesCache().get_NotesTable(context.Notes, formsemestre_id)
     etudids = nt.get_etudids()
-    use_ue_coef = context.get_preference("use_ue_coefs", formsemestre_id)
+    use_ue_coef = sco_preferences.get_preference(
+        context, "use_ue_coefs", formsemestre_id
+    )
     n += 1
     print("%d %s (%d) use_ue_coef=%s" % (n, formsemestre_id, len(etudids), use_ue_coef))
     for etudid in etudids: