diff --git a/OpenAPI/TS28536_CoslaNrm.yaml b/OpenAPI/TS28536_CoslaNrm.yaml
index fdb1c44cf1aaea72891e74a670adc7a955a65b84..ec61a362a456d8fc7aa9cb7aa60462c1f51dc0df 100755
--- a/OpenAPI/TS28536_CoslaNrm.yaml
+++ b/OpenAPI/TS28536_CoslaNrm.yaml
@@ -75,6 +75,7 @@ components:
     AssuranceTargetList:
       type: array
       uniqueItems: true
+      minItems: 1
       items:
         $ref: '#/components/schemas/AssuranceTarget'
 
@@ -94,6 +95,7 @@ components:
     AssuranceGoalStatusList:
       type: array
       uniqueItems: true
+      minItems: 1
       items:
         $ref: '#/components/schemas/AssuranceGoalStatus'
 
@@ -113,6 +115,7 @@ components:
     AssuranceTargetStatusList:
       type: array
       uniqueItems: true
+      minItems: 1
       items:
          $ref: '#/components/schemas/AssuranceTargetStatus'