This part—

(a) Prescribes reporting and recordkeeping requirements with respect to the hours of service of certain railroad employees and certain employees of railroad contractors and subcontractors;

(b) Establishes standards and procedures concerning the construction or reconstruction of sleeping quarters;

(c) Establishes minimum safety and health standards for camp cars provided by a railroad as sleeping quarters for its employees and individuals employed to maintain its rights of way; and

(d) Prescribes substantive hours of service requirements for train employees engaged in commuter or intercity rail passenger transportation.