Paragraph 2 X1

The passenger ticket shall constitute prima facie evidence of the conclusion and conditions of the contract of carriage. The absence, irregularity or loss of the passenger ticket does not affect the existence or the validity of the contract of carriage which shall, none the less, be subject to the rules of this Convention. Nevertheless, if, with the consent of the carrier, the passenger embarks without a passenger ticket having been delivered, or if the ticket does not include the notice required by paragraph (1) (c) of this Article, the carrier shall not be entitled to avail himself of the provisions of Article 22.