Article 91

Any State not a Member of the Organization, which is a party to any conventions, regulations and similar agreements listed in Article 99 or to which the Director-General has notified the adoption of these Regulations by the World Health Assembly, may become a party hereto by notifying its acceptance to the Director-General and, subject to the provisions of Article 101, such acceptance shall become effective upon the date of coming-into-force of these Regulations, or, if such acceptance is notified after that date three, months after the date of receipt by the Director-General of the notification of acceptance.

For the purpose of the application of these Regulations Articles 23, 33, 62, 63 and 64 of the Constitution of the Organization shall apply to any non-Member State which becomes a party to these Regulations.

Any non-Member State which has become a party to these Regulations may at any time withdraw from participation in these Regulations, by means of a notification addressed to the Director-General which shall take effect six months after he has received it. The State which has withdrawn shall, as from that date, resume application of the provisions of any conventions, regulations and similar agreements listed in Article 99 to which it was previously a party.