Section, acts Mar. 4, 1923, ch. 251, § 5,
42 Stat. 1454; June 17, 1930, ch. 497, title IV, § 645(b),
46 Stat. 761, related to travel, subsistence, and transportation expenses of customs officers and employees. These provisions are covered generally in chapter
57 of Title
5, Government Organization and Employees.