diff --git a/device-configuration/README.md b/device-configuration/README.md
index 5c46f69..80df760 100644
--- a/device-configuration/README.md
+++ b/device-configuration/README.md
@@ -48,6 +48,7 @@ interface NcPropertyValueHolder {
 interface NcObjectPropertiesHolder {
     attribute NcRolePath    path; // Object role path
     attribute sequence<NcRolePath>    dependencyPaths; // Sequence of role paths which are a dependency for this object (helpful to inform clients which objects need to be restored together)
+    attribute sequence<NcClassId>    allowedMembersClasses; // Sequence of class ids allowed as members of the block (non-block objects have this as an empty sequence)
     attribute sequence<NcPropertyValueHolder>    values; // Object properties values
     attribute NcBoolean    isRebuildable; // Describes if the object is rebuildable
 };
diff --git a/device-configuration/models/datatypes/NcObjectPropertiesHolder.json b/device-configuration/models/datatypes/NcObjectPropertiesHolder.json
index 222ce2f..ee549b5 100644
--- a/device-configuration/models/datatypes/NcObjectPropertiesHolder.json
+++ b/device-configuration/models/datatypes/NcObjectPropertiesHolder.json
@@ -19,6 +19,14 @@
             "isSequence": true,
             "constraints": null
         },
+        {
+            "description": "Sequence of class ids allowed as members of the block (non-block objects have this as an empty sequence)",
+            "name": "allowedMembersClasses",
+            "typeName": "NcClassId",
+            "isNullable": false,
+            "isSequence": true,
+            "constraints": null
+        },
         {
             "description": "Object properties values",
             "name": "values",