Artikel 19

1. Annexes to this Convention or to a protocol shall form an integral part of the Convention or, as the case may be, such protocol.
2. Except as may be otherwise provided in any protocol with respect to its annexes, the following procedure shall apply to the adoption and entry into force of amendments to annexes to this Convention or to annexes to a protocol:
(a) any Contracting Party may propose amendments to annexes to this Convention or to annexes to any protocol at a meeting convened pursuant to article 16;
(b) such amendments shall be adopted by a three-fourths majority vote of the Contracting Parties to the instrument in question present at the meeting referred to in article 16;
(c) the Depositary shall without delay communicate the amendments so adopted to all Contracting Parties to the Convention;
(d) any Contracting Party that is unable to accept an amendment to annexes to this Convention or to annexes to any protocol shall so notify the Depositary in writing within 90 days from the date on which the amendment was adopted;
(e) the Depositary shall without delay notify all Contracting Parties of notifications received pursuant to the preceding subparagraph;
(f) on expiry of the period referred to in subparagraph (d), the amendment to the annex shall become effective for all Contracting Parties to this Convention or to the protocol concerned which have not submitted a notification in accordance with the provisions of that subparagraph;
(g) a Contracting Party may at any time substitute an acceptance for a previous declaration of objection, and the amendment shall thereupon enter into force for that Party.
3. The adoption and entry into force of a new annex shall be subject to the same procedure as that for the adoption and entry into force of an amendment to an annex, provided that, if it entails an amendment to the Convention or to one of its protocols, the new annex shall not enter into force until such time as that amendment enters into force.
4. Any amendment to the Annex on Arbitration shall be proposed and adopted, and shall enter into force, in accordance with the procedures set out in article 18.