Artikel 22

1. After this Convention has been in force for three years, any Contracting State may, by notification to the Secretary-General of the United Nations, request that a conference be convened for the purpose of reviewing the Convention. The Secretary-General shall notify all Contracting States of the request and a review conference shall be convened by the Secretary-General if, within a period of four months following the date of notification by the Secretary-General, not less than one-half of the Contracting States notify him of their concurrence with the request.
2. If a conference is convened in accordance with the preceding paragraph, the Secretary-General shall notify all Contracting States and invite them to submit within a period of three months such proposals as they may wish the conference to consider. The Secretary-General shall circulate to all Contracting States the provisional agenda for the conference together with the texts of such proposals at least three months before the date on which the conference is to meet.
3. The Secretary-General shall invite to any conference convened in accordance with this article all Contracting States and all other States Members of the United Nations or of any of the specialized agencies.