Entered into force February 7, 1971.
In accordance with Article VIII, instruments of ratification or approval of the Agreement shall be deposited with the Government of the United States of America. The Agreement entered into force 30 days after deposit by two signatory Parties of their instruments of ratification or approval. The Agreement shall enter into force for each of the other signatory Parties 30 days after the deposit of its instrument of ratification or approval.