(1) may provide sleeping quarters (including crew quarters, camp or bunk cars, and trailers) for employees, and any individuals employed to maintain the right of way of a railroad carrier, only if the sleeping quarters are clean, safe, and sanitary and give those employees and individuals an opportunity for rest free from the interruptions caused by noise under the control of the carrier; and

(2) may not begin, after July 7, 1976, construction or reconstruction of sleeping quarters referred to in clause (1) of this section in an area or in the immediate vicinity of an area, as determined under regulations prescribed by the Secretary of Transportation, in which railroad switching or humping operations are performed.