Treaties and other international acts series. 2874. Highways, Boyd-Roosevelt Highway in Panama, modus vivendi agreement between United States and Panama, extending modus vivendi agreement of Sept. 14, 1950, effected by exchange of notes, signed Panama Aug. 11 and Sept. 14 and 21, 1953; entered into force Sept. 21, 1953, operative retroactively Sept. 14, 1953.

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