What permission is required to enable the doors after selecting the Cut-Out position of the ATC Door Mode switch?

The correct answer indicates that permission from the Trainmaster is necessary to enable the doors after selecting the Cut-Out position of the ATC (Automatic Train Control) Door Mode switch. This requirement is in place to ensure safety and operational control in managing the train's doors. The Trainmaster holds the authority to oversee and ensure that all safety protocols are followed, particularly in scenarios where the automated systems are overridden or put in a manual mode.

This permission is crucial because it prevents unintentional door operations that could put passengers or crew at risk. In high-stakes environments like train operations, it is vital to have checks in place to maintain order and safety, especially in scenarios where automatic systems may not be fully engaged or operational. Thus, seeking approval from a designated authority, such as the Trainmaster, serves as an important procedural safeguard.