In Rule 261 Territory, must not make a reverse movement beyond the limits of the block without:

• A. Verbal permission of the dispatcher (on signal indication)
• B. Form D line 2 authority
• C. Proceed indication on a controlled signal
• D. Dispatcher verbal permission only with a signal

Answer: (A)

In Rule 261 Territory, a reverse movement beyond the limits of the block requires the dispatcher's verbal permission. This rule exists because reversing into an adjacent block can create a collision risk if the next block isn’t known to be clear, so the dispatcher must explicitly authorize the move and coordinate with other traffic. The permission may be given in relation to a signal indication, but the essential requirement is the dispatcher's verbal clearance.

Form D line 2 authority is not the required permission for this action, and a proceed indication on a controlled signal does not by itself authorize reversing beyond block limits. Saying that permission is only with a signal adds an unnecessary constraint; the key point is obtaining verbal approval from the dispatcher.