Pub. L. 87-581, tit. I, sec. 103

Sec. 103. (a) The provisions of this Act shall apply, except as otherwise provided, to any contract which may require or involve the employment of laborers or mechanics upon a public work of the United States, of any territory, or of the District of Columbia, and to any other contract which may require or involve the employment of laborers or mechanics if such contract is one (1) to which the United States or any agency or instrumentality thereof, any territory, or the District of Columbia is a party, or. (21 which is made for or on behalf of the United States, any agency or instrumentality thereof, any territory, or the District of Columbia, or (3) which is a contract for work financed in whole or in part by loans or grants from, or loans insured or guaranteed by, the United States or any agency or instrumentality thereof under any statute of the United States providing wage standards for such work: Provided, That the provisions of section 102, shall not apply to work where the assistance from the United States or any agency or instrumentality as set forth above is only in that nature of a loan guarantee, or insurance. Except as otherwise expressly provided, the provisions of the Act shall apply to all laborers and mechanics, including watchmen and guards, employed by any contractor or subcontractor in the performance of any part of the work contemplated by any such contract, and for purposes of this Act, laborers and mechanics shall include workmen performing services in connection with dredging or rock excavation in any river or harbor of the United States or or any territory or of the District of Columbia, but shall not include any employee employed as a seaman. (b) This Act shall not apply to contracts for transportation by land, air, or water, or for the transmission of intelligence, or for the purchase of supplies or materials or articles ordinarily available in the open market. This Act shall not apply with respect to any work required to be done in accordance with the provisions of the Walsh-Healey Public Contracts Act (49 Stat., 2036; 41 U.S.C. 35–45).