49 C.F.R. § 236.772 Machine, interlocking.
Title 49 - Transportation
An assemblage of manually operated levers or other devices for the control of signals, switches or other units. Magnet, track, see §236.744.
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
§ 236.772 Machine, interlocking.