Section, acts June 25, 1948, ch. 646,
62 Stat. 950; May 24, 1949, ch. 139, § 95,
63 Stat. 103; Oct. 5, 1949, ch. 601,
63 Stat. 704; July 7, 1952, ch. 581,
66 Stat. 439; July 28, 1955, ch. 424, § 3,
69 Stat. 394, related to payment of witnesses fees to officers and employees of the United States. See sections
5515,
5537,
5751, and
6322 of Title
5, Government Organization and Employees.