Which rules do not apply in CSS territory?

In CSS (Centralized Signal System) territory, specific rules that pertain to the operation and management of signals do not apply to maintain the distinct signaling and operational practices established within these territories. The correct answer identifies Rules 554 and 556 as those that do not apply in CSS areas.

Rule 554 typically relates to the operation of signals that may not be relevant or compatible with the centralized system used in CSS territories. Similarly, Rule 556 addresses operational scenarios that are governed by the centralized signal system, thus using different protocols and practices that are more suited to the CSS framework.

Understanding how these rules interact with the existing signaling system is important for safe rail operations. In contrast, the other rules mentioned in the options pertain to different signaling or operational protocols that are not exclusively governed by CSS. By knowing which rules apply or do not apply, dispatchers and train operators can effectively manage rail operations within CSS territory and maintain safety standards.