1. Notification pursuant to Article 4 shall be submitted no later than 6 months after the final adoption of a measure if this measure is building upon the Schengen acquis. In case Denmark does not submit a notification in accordance with Articles 3 or 4 regarding measures building upon the Schengen acquis, the Member States bound by those measures and Denmark will consider appropriate steps to be taken.

2. A notification pursuant to Article 3 or Article 4 with respect to measures building upon the Schengen acquis shall be deemed irrevocably to be a notification pursuant to Article 3 with respect to any further proposal or initiative aiming to build upon that measure to the extent that such proposal or initiative is building upon the Schengen acquis.