Artikel 59

1. This Convention, including its Annexes, may be amended upon the proposal of a Contracting Party by the procedure specified in this Article.
2. Except as provided for under Articles 60 bis, any proposed amendment to this Convention shall be considered by the Administrative Committee composed of all the Contracting Parties in accordance with the rules of procedure set out in Annex 8. Any such amendment considered or prepared during the meeting of the Administrative Committee and adopted by it by a two-thirds majority of the members present and voting shall be communicated by the Secretary-General of the United Nations to the Contracting Parties for their acceptance.
3. Except as provided for under Articles 60 and 60 bis, any proposed amendment communicated in accordance with the preceding paragraph shall come into force with respect to all Contracting Parties three months after the expiry of a period of twelve months following the date of communication of the proposed amendment during which period no objection to the proposed amendment has been communicated to the Secretary-General of the United Nations by a State which is a Contracting Party.
4. If an objection to the proposed amendment has been communicated in accordance with paragraph 3 of this Article, the amendment shall be deemed not to have been accepted and shall have no effect whatsoever.