DSS2 — Service 9.11: Unsubscribe Interaction Class With Regions: invalid region

Only region specifications, not region templates, can be used as arguments to the Subscribe Interaction Class With Regions service, so it would make no sense to use a region template as argument to the Unsubscribe Interaction Class With Regions service. A region template cannot be subscribed, so it therefore cannot be unsubscribed either. A new precondition should be added to this service that says, "All supplied region designators are designators of region specifications." If a region designator specified is not a designator of a region specification, the "Invalid region" exception shall be generated

Add the suggested new pre-condition.