Artikel 15

1. [Requirement of Opportunity of Defense] Invalidation, by the competent authorities of a designated Contracting Party, of the effects, in part or in whole, in the territory of that Contracting Party, of the international registration may not be pronounced without the holder having, in good time, been afforded the opportunity of defending his rights.
2. [Notification of Invalidation] The Office of the Contracting Party in whose territory the effects of the international registration have been invalidated shall, where it is aware of the invalidation, notify it to the International Bureau.