49 C.F.R. § 236.790 Release, time.
Title 49 - Transportation
A device used to prevent the operation of an operative unit until after the expiration of a predetermined time interval after the device has been actuated.
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
§ 236.790 Release, time.