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Front #276
GCOR 15.1
Crew members must check the date and "OK" or issue time of the General Track Bulletin (GTB). If over ___ hours old when received, they must contact the train dispatcher and determine if additional track bulletins are needed.
Answer: FourFeedback: The 4 hours refer to on-duty time. Scenario 1: You are on duty at 1800, but GTB was issued at 1300 so you must contact the dispatcher. Scenario 2: You are on duty at 1800, GTB was issued at 1500, but you did not get on the train until 2000. The GTB is still valid because, although it was 5 hours ago, the GTB was issued within 4 hours of on-duty time.