49 C.F.R. § 236.330 Locking dog of switch-and-lock movement.
Title 49 - Transportation
Locking dog of switch-and-lock movement shall extend through lock rod one-half inch or more in either normal or reverse position.
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 C—Interlocking
Rules and Instructions
§ 236.330 Locking dog of switch-and-lock movement.