- Title 1 - General Provisions
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- Title 49 - Transportation
- Title 50 - Wildlife and Fisheries
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 C—Interlocking (§236.301 to §236.387) > 236.304—Mechanical locking or same protection effected by circuits.
236.304—Mechanical locking or same protection effected by circuits.
Mechanical locking, or the same protection effected by means of circuits, shall be provided.