Under which condition may a Dispatcher give a signal for assurance of protection across intervening tracks?

The correct answer is based on the principle of ensuring safety during train movements. A Dispatcher can give a signal for assurance of protection across intervening tracks when it has been confirmed that trains have come to a complete stop on those tracks. This confirmation allows the Dispatcher to ensure that there is no risk of moving trains interfering with the operation of other trains crossing or approaching the intervening tracks. This procedure is crucial for maintaining safe and efficient train operations, as it mitigates the risk of accidents caused by unexpected train movements.

In contrast, situations such as track maintenance, lack of communication with trains, or the presence of passengers on the platform do not provide the necessary assurance for safely giving such a signal. Each of those circumstances carries inherent risks that could lead to unsafe conditions if a signal were given prematurely. Therefore, confirmation of trains being stopped is critical; it is a necessary condition that ensures the Dispatcher’s actions do not compromise safety.