U.S. Code of Federal Regulations
Regulations most recently checked for updates: Oct 23, 2020
§ 236.303 - Control circuits for signals, selection through circuit controller operated by switch points or by switch locking mechanism.
§ 236.311 - Signal control circuits, selection through track relays or devices functioning as track relays and through signal mechanism contacts and time releases at automatic interlocking.
§ 236.313 - [Reserved]
RULES AND INSTRUCTIONS
§ 236.326 - Mechanical locking removed or disarranged; requirement for permitting train movements through interlocking.
§§ 236.331-236.333 - §[Reserved]
§ 236.340 - Electromechanical interlocking machine; locking between electrical and mechanical levers.
INSPECTION AND TESTS
§ 236.385 - [Reserved]