Artikel XV

A. Amendments to this Statute may be proposed by any Member. Certified copies of the text of any amendment proposed shall be prepared by the Director-General and communicated by him to all Members at least ninety days in advance of its consideration by the Assembly.
B. Amendments shall come into force for all Members:
1. when approved by the Assembly after consideration of observations submitted by the Council on each proposed amendment; and
2. after all the Members have consented to be bound by the amendment in accordance with their respective constitutional processes. Members shall express their consent to be bound by depositing a corresponding instrument with the Depositary referred to in Article XX paragraph A.
C. At any time after five years from the date when this Statute takes effect in accordance with paragraph D of Article XIX, a Member may withdraw from the Agency by notice in writing to that effect given to the Depositary referred to in Article XX paragraph A, which shall promptly inform the Council and all Members.
D. Such withdrawal shall take effect at the end of the year in which it is expressed. Withdrawal by a Member from the Agency shall not affect its contractual obligations entered into pursuant to Article V paragraph B or its financial obligations for the year in which it withdraws.