diff --git a/OpenAPI/TS28538_EdgeNrm.yaml b/OpenAPI/TS28538_EdgeNrm.yaml
index bd4e9657c42ea29d869b5d477cc5ed17a332c9c1..a70a4c08ea1b2ee5043327050369a1a4bde25658 100644
--- a/OpenAPI/TS28538_EdgeNrm.yaml
+++ b/OpenAPI/TS28538_EdgeNrm.yaml
@@ -99,13 +99,6 @@ components:
           readOnly: true
         secCredential:
           type: string
-    Duration:
-      type: object
-      properties:
-        startTime:
-          $ref: 'TS28623_ComDefs.yaml#/components/schemas/DateTime' 
-        endTime:
-          $ref: 'TS28623_ComDefs.yaml#/components/schemas/DateTime'
     EASServicePermission:
       type: string
       description: any of enumerated value
@@ -295,7 +288,7 @@ components:
               type: string
               readOnly: true
             eASSchedule:
-              $ref: '#/components/schemas/Duration'
+              $ref: 'TS28623_ComDefs.yaml#/components/schemas/TimeWindowRo'
             eASGeographicalServiceArea:
               $ref: '#/components/schemas/GeoLoc'
             eASTopologicalServiceArea:
@@ -394,7 +387,7 @@ components:
             softwareImageInfo:
               $ref: '#/components/schemas/SoftwareImageInfo'
             eASSchedule:
-              $ref: '#/components/schemas/Duration'
+              $ref: 'TS28623_ComDefs.yaml#/components/schemas/TimeWindow'
             eASFeature:
               $ref: '#/components/schemas/EASFeature'
             relocationPolicy: