When may a Dispatcher allow a train that is receiving or discharging passengers across an intervening track into the station?

The correct answer highlights the importance of safety protocols when allowing a train to cross an intervening track into a station while passengers are present. Establishing protection on the intervening track is crucial because it ensures that there is no danger from trains that may be traveling on that track. Protection can involve multiple safety measures, such as using signals, flagging, or other signaling devices to ensure that the track is clear before allowing the passenger train to proceed.

This protective measure safeguards the well-being of passengers and crew by minimizing the risk of collisions or accidents during boarding or discharging procedures. The safety of everyone involved is paramount, and the dispatcher's responsibility includes ensuring that all necessary protections are in place before making any decisions regarding train movements, particularly in passenger areas.

Other options do not address the critical safety requirement. Boards or departures contingent upon whether all passengers have boarded or only during daylight hours do not inherently ensure safety against moving trains on the intervening track. Likewise, the proximity of freight trains does not constitute a complete safety measure for passenger safety.