Treaties and other international acts series. 7150. Universal Postal Union, additional protocol to constitution, convention, and related documents between United States and other governments, Signed Tokyo Nov. 14, 1969, [approved by the President of United States July 2, 1971; entered into force July 1, 1971, except for art. 5 of additional protocol to constitution, which entered into force Jan. 1, 1971. with English text of constitution and final protocol signed Vienna July 10, 1964].