49 CFR § 236.577
Test, acknowledgement, and cut-in circuits
November 18, 2020
Test, acknowledgement, and cut-in circuits shall be tested at least once every twelve months.
[49 FR 3387, Jan. 26, 1984]
Test, acknowledgement, and cut-in circuits shall be tested at least once every twelve months.
[49 FR 3387, Jan. 26, 1984]