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CFR > Title 49 - Transportation > SUBTITLE B—Other Regulations Relating to Transportation > CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (Parts 200–269) > PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES > SUBPART E—Automatic Train Stop, Train Control and Cab Signal Systems (§236.501 to §236.590) > 236.577—Test, acknowledgement, and cut-in circuits.
236.577—Test, acknowledgement, and cut-in circuits.
Test, acknowledgement, and cut-in circuits shall be tested at least once every twelve months.
[49 FR 3387, Jan. 26, 1984]