Section, acts Mar. 10, 1950, ch. 54, title 1, § 6, 64 Stat. 16; Aug. 8, 1953, ch. 396, § 1, 67 Stat. 506, provided that Commission complete its affairs in connection with settlement of all United States-Yugoslavian Claims arising under Yugoslav Claims Agreement of 1948, by December 31, 1954.