US lawFederal (United States)RegulationsTitle 49 CFR — TransportationChapter II — FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATIONPart 236 — RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCESSubpart G — Definitions236.81549 C.F.R. § 236.815Stop.Last amended: 2017Year: 2026Length: 16 wordsOfficial source Cite as 49 C.F.R. § 236.815 (2026)As applied to mechanical locking, a device secured to a locking bar to limit its movement.Previous49 C.F.R. § 236.814Next49 C.F.R. § 236.816