Section was formerly classified to section 450d of this title prior to editorial reclassification and renumbering as this section, and to section 516b of Title 5 prior to the general revision and enactment of Title 5, Government Organization and Employees, by Pub. L. 89–554, § 1, Sept. 6, 1966, 80 Stat. 378.

1966—Pub. L. 89–554 repealed third sentence which related to grade of a position. See section 5109 of Title 5, Government Organization and Employees.