22 U.S.C. § 888
Section, acts Aug. 13, 1946, ch. 957, title IV, §443, 60 Stat. 1006; Apr. 5, 1955, ch. 23, §3, 69 Stat. 24, related to salary differentials for Foreign Service officers, Reserve officers, and staff officers. See section 5921 et seq. of Title 5, Government Organization and Employees.