diff --git a/OpenAPI/TS28105_AiMlNrm.yaml b/OpenAPI/TS28105_AiMlNrm.yaml
index 4bdb73a0e7787862d51903c1fd4f65846230569c..cc688f5eeda369fa450456006e4fe62a89e36636 100644
--- a/OpenAPI/TS28105_AiMlNrm.yaml
+++ b/OpenAPI/TS28105_AiMlNrm.yaml
@@ -69,6 +69,7 @@ components:
       properties:
         thresholdList:
           type: array
+          uniqueItems: true
           items:
             $ref: 'TS28623_ThresholdMonitorNrm.yaml#/components/schemas/ThresholdInfo'
         managedActivationScope:
@@ -91,18 +92,21 @@ components:
           properties:
             dNList:
               type: array
+              uniqueItems: true
               items:
                 $ref: 'TS28623_ComDefs.yaml#/components/schemas/Dn'
         - type: object
           properties:
             timeWindow:
               type: array
+              uniqueItems: true
               items:
                 $ref: 'TS28623_ComDefs.yaml#/components/schemas/TimeWindow'
         - type: object
           properties:
             geoPolygon:
               type: array
+              uniqueItems: true
               items:
                 $ref: 'TS28623_ComDefs.yaml#/components/schemas/GeoArea'
                 
@@ -124,10 +128,12 @@ components:
           type: string
         mLCapabilityVersionId:
           type: array
+          uniqueItems: true
           items:
             type: string
         expectedPerformanceGains:
           type: array
+          uniqueItems: true
           items:
             $ref: '#/components/schemas/ModelPerformance'
         mLModelRef:
@@ -138,12 +144,14 @@ components:
       properties:
         inferenceOutputId:
           type: array
+          uniqueItems: true
           items:
             type: string
         aIMLInferenceName:
           type: string
         inferenceOutputTime:
           type: array
+          uniqueItems: true
           items:
             $ref: 'TS28623_ComDefs.yaml#/components/schemas/DateTime'
           # FIXME, isOrder/isUnique both as True
@@ -229,6 +237,7 @@ components:
                       type: string  
                     candidateTrainingDataSource:
                       type: array
+                      uniqueItems: true
                       items:
                         type: string
                     trainingDataQualityScore:
@@ -241,6 +250,7 @@ components:
                       $ref: '#/components/schemas/MLContext'
                     performanceRequirements:
                       type: array
+                      uniqueItems: true
                       items:
                         $ref: '#/components/schemas/ModelPerformance'
                     cancelRequest:
@@ -291,16 +301,19 @@ components:
                   properties:
                     usedConsumerTrainingData:
                       type: array
+                      uniqueItems: true
                       items:
                         type: string
                     modelConfidenceIndication:
                       type: integer
                     modelPerformanceTraining:
                       type: array
+                      uniqueItems: true
                       items:
                         $ref: '#/components/schemas/ModelPerformance'
                     modelPerformanceValidation:
                       type: array
+                      uniqueItems: true
                       items:
                         $ref: '#/components/schemas/ModelPerformance'
                     dataRatioTrainingAndValidation:
@@ -371,6 +384,7 @@ components:
                   properties:
                     modelPerformanceTesting:
                       type: array
+                      uniqueItems: true
                       items:
                         $ref: '#/components/schemas/ModelPerformance'
                     mLTestingResult:
@@ -458,6 +472,7 @@ components:
                   $ref: '#/components/schemas/SupportedPerfIndicator'
                 mLCapabilitiesInfoList:
                   type: array
+                  uniqueItems: true
                   items:
                     $ref: '#/components/schemas/MLCapabilityInfo'
                 retrainingEventsMonitorRef:
@@ -525,10 +540,12 @@ components:
               properties:
                 performanceGainThreshold:
                   type: array
+                  uniqueItems: true
                   items:
                     $ref: '#/components/schemas/ModelPerformance'
                 newCapabilityVersionId:
                   type: array
+                  uniqueItems: true
                   items:
                     type: string
                 updateTimeDeadline:
@@ -628,6 +645,7 @@ components:
                   properties:
                     inferenceOutputs:
                       type: array
+                      uniqueItems: true
                       items:
                         $ref: '#/components/schemas/InferenceOutput'
                       minItems: 1