Where Rule 251 is in effect, a train must not make a reverse movement - beyond the limits- of the block without?

Where Rule 251 is in effect, a train must not make a reverse movement - beyond the limits- of the block without?

• A. Form D line 2 authority, as prescribed by non-signaled DCS rules.
• B. Verbal permission of the Dispatcher.
• C. Written permission from the station master.
• D. Routine crew consent.

Answer: (A)

Rule 251 governs movements that reverse beyond the block limits. When this rule is in effect, such reverse movement cannot occur without a formal authority, specifically Form D line 2, issued under non-signaled Direct Communications System rules. This written authority provides the dispatcher’s explicit permission for the reverse move and outlines where and under what conditions it may proceed, preventing conflicts with other trains or work crews in the block. Verbal permission, station-master written approval, or routine crew consent do not satisfy this requirement under non-signaled DCS rules, so they are not adequate authorization.

Rule 251 governs movements that reverse beyond the block limits. When this rule is in effect, such reverse movement cannot occur without a formal authority, specifically Form D line 2, issued under non-signaled Direct Communications System rules. This written authority provides the dispatcher’s explicit permission for the reverse move and outlines where and under what conditions it may proceed, preventing conflicts with other trains or work crews in the block. Verbal permission, station-master written approval, or routine crew consent do not satisfy this requirement under non-signaled DCS rules, so they are not adequate authorization.