(a) The requirements set forth in 29 CFR parts 1, 3 and 5 for compliance with labor standards laws apply to projects under these programs to the extent that labor standards apply as provided in section 212 of the Act, provided that:

(1) The labor standards provisions do not apply to projects insured under sections 207 or 232 pursuant to section 223(f) of the Act; and

(2) Supplemental loans under section 241 of the Act are subject to the provisions of section 212 applicable to the section or title pursuant to which the mortgage covering the project is insured or pursuant to which the original mortgage was insured.

(b) The requirements set forth in 24 CFR part 70 apply to those programs with respect to which there is a statutory provision allowing HUD waiver of Davis-Bacon prevailing wage rates for volunteers.

(c) Project commitments, contracts and agreements, as determined by the Commissioner, and construction contracts and subcontracts, shall include terms, conditions and standards for compliance with applicable requirements set forth in 29 CFR parts 1, 3 and 5 and section 212 of the Act.

(d) No advance under a loan or mortgage that is subject to the requirements of section 212 shall be eligible for insurance unless there is filed with the application for the advance a certificate as required by the Commissioner certifying that the laborers and mechanics employed in construction of the project have been paid not less than the wage rates required under section 212.