2. Non-EU carriers shall mandate in writing the authorised representative to act on their behalf for the purpose of ensuring compliance with Article 3(2) and (3), Article 5(6), third subparagraph, and Article 15(1) of this Regulation. Such authorised representative may be addressed in addition to the non-EU carriers or instead of them. The authorised representative’s mandate shall be valid only when accepted in writing by the authorised representative. The designation of an authorised representative shall be without prejudice to legal actions which could be initiated against the non-EU carriers.