Congressman William Steiger described the scope of the Act's coverage in the following words during a discussion of the legislation on the floor of the House of Representatives:
The coverage of this bill is as broad, generally speaking, as the authority vested in the Federal Government by the commerce clause of the Constitution (Cong. Rec., vol. 116, p. H-11899, Dec. 17, 1970)
The legislative history, as a whole, clearly shows that every amendment or other proposal which would have resulted in any employee's being left outside the protections afforded by the Act was rejected. The reason for excluding no employee, either by exemption or limitation on coverage, lies in the most fundamental of social purposes of this legislation which is to protect the lives and health of human beings in the context of their employment.
In carrying out the broad coverage mandate of Congress, we interpret the term "business" in the above definition as including any commercial or noncommercial activity affecting commerce and involving the employment of one or more employees; the term "commerce" is defined in the Act itself, in section 3(3). Since the legislative history and the words of the statute, itself, indicate that Congress intended the full exercise of its commerce power in order to reduce employment-related hazards which, as a whole impose a substantial burden on commerce, it follows that all employments where such hazards exist or could exist (that is, those involving the employment of one or more employees) were intended to be regulated as a class of activities which affects commerce.
29 C.F.R. §1975.3