Without prejudice to claims for compensation in accordance with Article 7, if a passenger covered by this Regulation wants to make a complaint to the carrier, he shall submit it within 3 months from the date on which the regular service was performed or when a regular service should have been performed. Within 1 month of receiving the complaint, the carrier shall give notice to the passenger that his complaint has been substantiated, rejected or is still being considered. The time taken to provide the final reply shall not be longer than 3 months from the receipt of the complaint.