1. At any time and without prejudice to Article 8 Denmark may, in accordance with its constitutional requirements, notify the other Member States that with effect from the first day of the month following the notification Part I of this Protocol shall consist of the provisions in the Annex to this Protocol.

2. Six months after the date on which such notification takes effect all Schengen acquis and measures adopted to build upon this acquis, which until then have been binding on Denmark as obligations under international law, shall be binding upon Denmark as Union law.