49 C.F.R. § 236.826 System, automatic train stop.
Title 49 - Transportation
A system so arranged that its operation will automatically result in the application of the brakes until the train has been brought to a stop.
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
§ 236.826 System, automatic train stop.

