The critical incident stress plan of a railroad subject to this part shall state that it covers, and shall cover, the following individuals employed by the railroad if they are directly involved (as defined in Sec. 272.9) in a critical incident:
(a) Railroad employees who are subject to the hours of service laws at--
(1) 49 U.S.C. 21103 (that is, train employees not subject to subpart F of part 228 of this chapter regarding the hours of service of train employees engaged in commuter or intercity rail passenger transportation);
(2) 49 U.S.C. 21104 (signal employees); or
(3) 49 U.S.C. 21105 (dispatching service employees);
(b) Railroad employees who are subject to the hours of service regulations at subpart F of part 228 of this chapter (regarding the hours of service of train employees engaged in commuter or intercity rail passenger transportation);
(c) Railroad employees who inspect, install, repair, or maintain railroad right-of-way or structures; and
(d) Railroad employees who inspect, repair, or maintain locomotives, passenger cars, or freight cars.