Final answer:
When a train cannot move under its own power, it must be secured and the Control Center Desk Superintendent must be notified immediately to ensure safety.
Step-by-step explanation:
When a train cannot move under its own power, it must be secured and the Control Center Desk Superintendent must be notified immediately.
This is because a non-functioning train can pose a safety risk on the tracks and requires prompt action to ensure the safety of passengers and other trains.