If the register indicates that the block territory is occupied, what must a new entry do?

When the register indicates that the block territory is occupied, the priority is to ensure safety and compliance with operational protocols. The correct action is for the new entry to contact all preceding entries before signing. This step is essential as it allows the dispatcher to verify the status of the occupied territory and communicate with any trains that may be in that block.

By consulting with the preceding entries, the dispatcher can assess the situation, potentially gather additional information about the reasons for the occupation, and decide whether or not to permit further movements in that block. This communication plays a critical role in preventing accidents and ensuring that all trains are working under the same understanding of the occupancy status, thus maintaining safe operations.

In contrast, waiting until the territory is vacated would result in delays and may not always be practical, especially if the block is occupied for an extended period. Entering regardless of occupancy status disregards safety protocols and could lead to dangerous situations. Continuing to occupy based on standard procedure may also create conflicts with the occupied status and is not a proactive safety measure that maintains communication between train operations.