CFR /  Title 29  /  Part 4  /  Sec. 4.154 Employees covered by sections 2(a)(3) and (4).

The safety and health standards of section 2(a)(3) and the notice requirements of section 2(a)(4) of the Act (see Sec. 4.183) are applicable, in the absence of a specific exemption, to every service employee engaged by a contractor or subcontractor to furnish services under a contract subject to section 2(a) of the Act.