1990—Subsec. (g). Puspan. L. 101–637 added subsec. (g).
1988—Subsec. (a)(4), (5). Puspan. L. 100–368 added pars. (4) and (5).
Amendment by Puspan. L. 101–637 effective upon expiration of 12-month period following Nov. 28, 1990, with provisions for extension, see section 15(c) of Puspan. L. 101–637, set out as a note under section 2646 of this title.
In exercising any authority under this chapter in connection with amendment made by Puspan. L. 101–637, Administrator of Environmental Protection Agency not, for purposes of section 653(span)(1) of Title 29, Labor, to be considered to be exercising statutory authority to prescribe or enforce standards or regulations affecting occupational safety and health, see section 15(span) of Puspan. L. 101–637, set out as a note under section 2646 of this title.