Under which condition may a train pass a non-controlled Stop Signal without permission from the Dispatcher?

A train may pass a non-controlled Stop Signal without permission from the Dispatcher specifically when coupling to equipment that is standing immediately beyond the signal. This situation is grounded in safety protocols that allow train crews to carry out necessary operations without having to stop and wait for authorization, which could delay operations and potentially create unsafe conditions on the track.

In practice, coupling to standing equipment is considered a routine operational task, and the procedure is designed to maintain workflow while still ensuring safety measures are followed. Therefore, this scenario provides a clear and actionable protocol, allowing the crew to continue operations while adhering to the necessary safety guidelines.

The other conditions mentioned do not universally allow passage without permission. For example, having a crew member on board is a standard requirement, but it does not automatically grant the authority to override a Stop Signal. A malfunctioning signal typically requires specific protocols to address the issue, rather than simply permitting the train to pass without permission. Lastly, moving at a low speed doesn't provide a legal exception for disregarding a Stop Signal; signals must always be obeyed regardless of speed to maintain safety standards on the rails.