49 C.F.R. § 236.732 Controller, circuit; switch.
Title 49 - Transportation
A device for opening and closing electric circuits, operated by a rod connected to a switch, derail or movable-point frog.
Title 49: Transportation
PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart G—Definitions
§ 236.732 Controller, circuit; switch.