49 C.F.R. § 236.771 Machine, control.
Title 49 - Transportation
An assemblage of manually operated devices for controlling the functions of a traffic control system; it may include a track diagram with indication lights.
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
§ 236.771 Machine, control.