U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 49Chapter IIPart 236Subpart E - Subpart E—Automatic Train Stop, Train Control and Cab Signal Systems
View all text of Subpart E [§ 236.501 - § 236.590]
§ 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]
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