Section 644 of title 20, referred to in subsecs. (b) and (f)(5), was repealed by Pub. L. 103–382, title III, § 331(a), Oct. 20, 1994, 108 Stat. 3965.

Act of March 3, 1921, referred to in subsec. (f)(1), probably means the act of Mar. 3, 1931, ch. 411, 46 Stat. 1494, as amended, known as the Davis-Bacon Act, which was classified generally to sections 276a to 276a–5 of former Title 40, Public Buildings, Property, and Works, and was repealed and reenacted as sections 3141–3144, 3146, and 3147 of Title 40, Public Buildings, Property, and Works, by Pub. L. 107–217, §§ 1, 6 (b), Aug. 21, 2002, 116 Stat. 1062, 1304.

“Secretary of Education” substituted for “United States Commissioner of Education” in subsec. (b), and “Department of Education” substituted for “Department of Health, Education, and Welfare” in subsec. (f)(2), (5), pursuant to sections 301 and 507 of Pub. L. 96–88, which is classified to sections 3441 and 3507 of Title 20, Education, and which transferred functions and offices (relating to education) of Commissioner of Education and Department of Health, Education, and Welfare to Secretary and Department of Education.