DSS2 — Service 9.7: Unassociate Regions For Updates: invalid region

Only region specifications, not region templates, can be used as arguments to the Associate Regions For Updates service, so it would make no sense to use a region template as argument to the Unassociate Regions For Updates service. A region template cannot be associated for updates, so it therefore cannot be unassociated for updates either. A new precondition needs to 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.