diff --git a/OpenAPI/TS28541_5GcNrm.yaml b/OpenAPI/TS28541_5GcNrm.yaml
index 36e4a27675d394d1158f5317b8dd61d7ef61176c..8c05a050c4c7f6580aeaf1a4f7ad2458dce9ff8c 100755
--- a/OpenAPI/TS28541_5GcNrm.yaml
+++ b/OpenAPI/TS28541_5GcNrm.yaml
@@ -876,6 +876,15 @@ components:
           $ref: 'TS29512_Npcf_SMPolicyControl.yaml#/components/schemas/MulticastAccessControl'
         snssaiList:
           $ref: '#/components/schemas/SnssaiList'
+        l4sInd:
+          anyOf:
+          - type: string
+            enum:
+              - UL
+              - DL
+              - UL_DL
+          - type: string
+
 
     TrafficControlDataList:
       type: array