49 C.F.R. § 230.79 Train signal system.
Title 49 - Transportation
Where utilized, the train signal system, or any other form of on-board communication, shall be tested and known to be in safe and suitable condition for service at the beginning of each day the locomotive is used.
Title 49: Transportation
PART 230—STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS
Subpart C—Steam Locomotives and Tenders
Brake and Signal Equipment
§ 230.79 Train signal system.