25 U.S. Code § 450e - Wage and labor standards
All laborers and mechanics employed by contractors or subcontractors (excluding tribes and tribal organizations) in the construction, alteration, or repair, including painting or decorating of buildings or other facilities in connection with contracts or grants entered into pursuant to this subchapter, shall be paid wages at not less than those prevailing on similar construction in the locality, as determined by the Secretary of Labor in accordance with sections 3141–3144, 3146, and 3147 of title 40. With respect to construction, alteration, or repair work to which the Act of March 3, 1921  is applicable under the terms of this section, the Secretary of Labor shall have the authority and functions set forth in Reorganization Plan Numbered 14, of 1950, and section 3145 of title 40.
Notwithstanding subsections (a) and (b), with respect to any self-determination contract, or portion of a self-determination contract, that is intended to benefit one tribe, the tribal employment or contract preference laws adopted by such tribe shall govern with respect to the administration of the contract or portion of the contract.
 See References in Text note below.
Act of March 3, 1921, referred to in subsec. (a), probably means the act of March 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was classified generally to sections 276a to 276a–5 of former Title 40, Public Buildings, Property, and Works, and was repealed and reenacted as sections 3141–3144, 3146, and 3147 of Title 40, Public Buildings, Property, and Works, by Pub.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.
Reorganization Plan Numbered 14 of 1950, referred to in subsec. (a), is set out in the Appendix to Title 5, Government Organization and Employees.
Act of April 16, 1934, referred to in subsec. (b), is act Apr. 16, 1934, ch. 147, 48 Stat. 596, as amended, popularly known as the Johnson-O’Malley Act, which is classified generally to section 452 et seq. of this title. For complete classification of this Act to the Code, see Short Title note set out under section 452 of this title and Tables.
This subchapter, referred to in subsecs. (a) and (b), was in the original “this Act”, meaning Pub. L. 93–638, Jan. 4, 1975, 88 Stat. 2203, known as the Indian Self-Determination and Education Assistance Act, which is classified principally to this subchapter. For complete classification of this Act to the Code, see Short Title note set out under section 450 of this title and Tables.
In subsec. (a), “sections 3141–3144, 3146, and 3147 of title 40” substituted for “the Davis-Bacon Act of March 3, 1931 (46 Stat. 1494), as amended” and “section 3145 of title 40” substituted for “section 2 of the Act of June 13, 1934 (48 Stat. 948, 40 U.S.C. 276c)” on authority of Pub. L. 107–217, § 5(c), Aug. 21, 2002, 116 Stat. 1303, the first section of which enacted Title 40, Public Buildings, Property, and Works.