diff --git a/yang-models/_3gpp-common-subscription-control.yang b/yang-models/_3gpp-common-subscription-control.yang
index b637e1ff53c5de712befab920a09e955a26b5ed7..179a2ab666ad8d26a930fd10847bd934557b03c8 100755
--- a/yang-models/_3gpp-common-subscription-control.yang
+++ b/yang-models/_3gpp-common-subscription-control.yang
@@ -10,14 +10,15 @@ module _3gpp-common-subscription-control {
   contact "https://www.3gpp.org/DynaReport/TSG-WG--S5--officials.htm?Itemid=464";
     
   description "Defines IOCs for subscription and heartbeat control.
-    Copyright 2024, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, 
+    Copyright 2025, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, 
     TTA, TTC). All rights reserved.";
   reference "3GPP TS 28.623
       Generic Network Resource Model (NRM)
       Integration Reference Point (IRP);
       Solution Set (SS) definitions
       3GPP TS 28.623";
-  
+      
+  revision 2025-03-31 { reference CR-0518 ; }   
   revision 2024-05-18 { reference CR-0359 ; } 
   revision 2024-01-18 { reference "CR-0309 CR-0329" ; } 
   revision 2023-09-18 { reference CR-0271 ; } 
@@ -94,6 +95,32 @@ module _3gpp-common-subscription-control {
     }    
   }
   
+  typedef NotificationTypes {
+    description "An extensible enumeration of notification types";
+    type union {
+      type enumeration {
+        enum notifyMOICreation;
+        enum notifyMOIDeletion;
+        enum notifyMOIAttributeValueChanges;
+        enum notifyMOIChanges;
+        enum notifyEvent;
+        enum notifyNewAlarm;
+        enum notifyChangedAlarm;
+        enum notifyAckStateChanged;
+        enum notifyComments;
+        enum notifyCorrelatedNotificationChanged;
+        enum notifyChangedAlarmGeneral;
+        enum notifyClearedAlarm;
+        enum notifyAlarmListRebuilt;
+        enum notifyPotentialFaultyAlarmList;
+        enum notifyFileReady;
+        enum notifyFilePreparationError;
+        enum notifyThresholdCrossing ;
+      }
+      type string;
+    }
+  }
+  
   grouping NtfSubscriptionControlGrp {
     description "Attributes of a specific notification subscription";
     
@@ -103,14 +130,14 @@ module _3gpp-common-subscription-control {
     }
     
     leaf-list notificationTypes {
-      type string;
-      description "Defines the types of notifications that are candidates 
-        for being forwarded to the notification recipient.
-        If the notificationTypes attribute is not supported or not present 
-        all candidate notifications types are forwarded to the notification; 
-        discriminated by notificationFilter attribute.";
+          type NotificationTypes;
+          description "Defines the types of notifications that are candidates 
+            for being forwarded to the notification recipient.
+            If the notificationTypes attribute is not supported or not present 
+            all candidate notifications types are forwarded to the notification; 
+            discriminated by notificationFilter attribute.";
     }
-
+        
     list scope {
       description "Scopes (selects) data nodes in an object tree.";
       key idx;
@@ -289,7 +316,7 @@ module _3gpp-common-subscription-control {
     description "Attributes of SupportedNotifications.";
       
     leaf-list notificationTypes {
-      type string;
+      type NotificationTypes;
       config false;
       description "List of notification types supported by the MnS producer";
     }