diff --git a/src/SOL003/VNFPackageManagement/definitions/SOL003VNFPackageManagement_def.yaml b/src/SOL003/VNFPackageManagement/definitions/SOL003VNFPackageManagement_def.yaml
index 0b82df5cf9493b0b536a92457369a0b1556b056a..557fe7cd7f39e09edc246e231f0925bceab053d8 100644
--- a/src/SOL003/VNFPackageManagement/definitions/SOL003VNFPackageManagement_def.yaml
+++ b/src/SOL003/VNFPackageManagement/definitions/SOL003VNFPackageManagement_def.yaml
@@ -8,7 +8,6 @@ definitions:
     type: object
     required:
       - id
-      - packageSecurityOption
       - operationalState
       - usageState
       - vnfmInfo
@@ -71,6 +70,7 @@ definitions:
       packageSecurityOption:
         description: >
           Signals the security option used by the package as defined in clause 5.1 of ETSI GS NFV-SOL 004.
+          It shall be present after the VNF package content has been on-boarded and absent otherwise.
           Valid values: OPTION_1, OPTION_2
         type: string
         enum: