StacksVerified U.S. regulatory reference

49 CFR §236.588

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
Except as provided in § 236.586, periodic test of the automatic train stop, train control, or cab signal apparatus shall be made at least once every 92 days, and on multiple-unit cars as specified by the carrier, subject to approval by the FRA.