1. Any Contracting State may denounce this Convention at any time by a notification addressed to the Secretary-General of the United Nations.

2. Such denunciation shall take effect for the Contracting State concerned one year from the date upon which it is received by the Secretary-General of the United Nations.

3. Any State which has made a declaration or notification under article 40 may, at any time thereafter, by a notification to the Secretary-General of the United Nations, declare that the Convention shall cease to extend to such territory one year after the date of receipt of the notification by the Secretary-General.