In subsec. (b), “subchapter I of chapter 57 of title 5, or section 5731(a) of title 5” substituted for “the Travel Expense Act of 1949, or section 10 of the Act of March 3, 1933 (U.S.C., title 5, sec. 73b)” on authority of Pub. L. 89–554, § 7(b), Sept. 6, 1966, 80 Stat. 631, the first section of which enacted Title 5, Government Organization and Employees.

In subsec. (c), “section 501 of title 44 or section 6101 of title 41” substituted for “section 11 of the Act of March 1, 1919 (U.S.C., title 44, sec. 111), or section 3709 of the Revised Statutes (U.S.C., title 41, sec. 5)” on authority of Pub. L. 90–620, § 2(b), Oct. 22, 1968, 82 Stat. 1305, which Act enacted Title 44, Public Printing and Documents, and Pub. L. 111–350, § 6(c), Jan. 4, 2011, 124 Stat. 3854, which Act enacted Title 41, Public Contracts.

In subsec. (d), “section 6101 of title 41” substituted for “section 3709 of the Revised Statutes (U.S.C., title 41, sec. 5)” on authority of Pub. L. 111–350, § 6(c), Jan. 4, 2011, 124 Stat. 3854, which Act enacted Title 41, Public Contracts.