Treaties and other international acts series. 8036. Air transport services, agreement between United States and Panama amending agreement of Mar. 31, 1949 as amended, effected by exchange of notes, signed. Panama, Dec. 23, 1974 and Mar. 6, 1975 with memorandum of consultations signed Washington, Dec. 18, 1974; [entered into force Mar. 6, 1975].