diff --git a/passerelle/contrib/toulouse_maelis/models.py b/passerelle/contrib/toulouse_maelis/models.py
index 3abb6b2e..470cb5dc 100644
--- a/passerelle/contrib/toulouse_maelis/models.py
+++ b/passerelle/contrib/toulouse_maelis/models.py
@@ -1848,7 +1848,11 @@ class ToulouseMaelis(BaseResource, HTTPResource):
                     activity = schedule['activity']
                     if not activity['activityType']['natureSpec']:
                         continue
-                    if activity['activityType']['natureSpec']['code'] not in ['A', 'R', 'X']:
+                    if (
+                        activity['activityType']['natureSpec']['code'] not in self.get_perisco_nature_codes()
+                        and activity['activityType']['natureSpec']['code']
+                        not in self.get_extrasco_nature_codes()
+                    ):
                         continue
                     activity_id = activity['idAct']
                     many_units = len(schedule['unitScheduleList']) > 1
@@ -1864,7 +1868,8 @@ class ToulouseMaelis(BaseResource, HTTPResource):
                                 'prefill': day['scheduledPresence'] > 0 or day['realPresence'] > 1,
                                 'disabled': (
                                     day['status'] != 'WRITABLE'
-                                    or activity['activityType']['natureSpec']['code'] in ['X']
+                                    or activity['activityType']['natureSpec']['code']
+                                    in self.get_extrasco_nature_codes()
                                 ),
                                 'details': day,
                             }
@@ -1874,7 +1879,10 @@ class ToulouseMaelis(BaseResource, HTTPResource):
                             booking['details']['status_color'] = color
                             booking['details']['activity_id'] = activity_id
                             booking['details']['activity_type'] = activity['activityType']['code']
-                            if activity['activityType']['natureSpec']['code'] in ['A', 'R']:
+                            if (
+                                activity['activityType']['natureSpec']['code']
+                                in self.get_perisco_nature_codes()
+                            ):
                                 booking['details']['activity_label'] = activity['activityType']['libelle']
                             else:
                                 booking['details']['activity_label'] = (
@@ -2274,8 +2282,7 @@ class ToulouseMaelis(BaseResource, HTTPResource):
     def read_activity_list(self, request, ref_date, nature_ids=None):
         reference_year = utils.get_reference_year_from_date(ref_date)
         if not nature_ids:
-            # actual loisir nature codes
-            nature_filter_codes = ['P', 'L', 'S'] + [str(i) for i in range(1, 10)]
+            nature_filter_codes = self.get_loisir_nature_codes()
         else:
             nature_filter_codes = [x.strip() for x in nature_ids.split(',') if x.strip()]
         labels = {