Treaties and other international acts series. 7923. Refugee relief in Republic of Viet-Nam, Laos and Khmer Republic, agreement between United States and International Committee of Red Cross, amending agreement of Nov. 1, 1973, as amended, effected by United States letter signed Washington, July 30, 1974; [entered into force July 30, 1974], and amending agreement signed Geneva and Washington, Aug. 22 and Sept. 6, 1974; [entered into force Sept. 6, 1974].