When is a track warrant in effect?

• A. The OK time is shown on it
• B. The dispatcher approves by radio
• C. The date is printed
• D. The tracks are listed

Answer: (A)

The move is authorized to start at the exact moment listed as the OK time on the warrant. That OK time marks when the authorization becomes effective, letting the train enter and occupy the specified tracks.

Approval by radio is how the warrant is issued, but the in-effect moment is tied to that start time, not the act of approval itself. The printed date tells you the calendar day, not the precise start moment. The tracks listed show which blocks are allowed, but they don’t specify when the authorization begins.