| http://www.w3.org/ns/prov#value | - May 24, 1950, 64 Stat. 1267) and is for construction, alteration, and repair, including painting and decorating, must provide that no contractor or subcontractor contracting for any part of the contract work shall require any laborer or mechanic employed in the performance of the contract to work in surroundings or under working conditions that are unsanitary, hazardous, or dangerous to health or
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