Artikel 28

1. Any State may, at the time of signature, ratification or accession, or at any time thereafter, declare, by notification addressed to the Secretary-General of the United Nations, that the provisions of this Convention will be applicable to all or any of the territories for the international relations of which it is responsible. These provisions shall become applicable in the territories named in the notification thirty days after the date of receipt of such notification by the Secretary-General or, if the Convention has not entered into force at that time, then upon the date of its entry into force.
2. Each Contracting State, when circumstances permit, undertakes to take as soon as possible the necessary steps in order to extend the application of this Convention to the territories for the international relations of which it is responsible, subject, where necessary for constitutional reasons, to the consent of the Governments of such territories.
3. Any State which has made a declaration under paragraph 1 of this article applying this Convention to any territory for the international relations of which it is responsible may at any time thereafter declare by notification given to the Secretary-General that the Convention shall cease to apply to any territory named in the notification and the Convention shall, after the expiration of one year from the date of the notification, cease to apply to such territory.