Is it permissible to open the case door of an electric lock within CTC limits without permission?

Opening the case door of an electric lock within Centralized Traffic Control (CTC) limits is a procedure that is governed by safety protocols to ensure the integrity of the system and the safety of personnel. The need for permission from the control operator is based on the fact that tampering with or accessing the locking mechanism can potentially disrupt train operations or lead to unsafe conditions.

The control operator is responsible for overseeing the operations in the CTC area, and any actions that could affect signal systems or train movement need to be coordinated through them. This requirement protects not only the equipment but also the personnel working around them by ensuring that everyone is aware of changes being made to the system, which could affect train traffic.

Other options suggest scenarios such as always permitting access, allowing it only in emergencies, or requiring permission from local authorities, none of which align with the established safety protocols and operational procedures that prioritize effective communication and oversight within the scope of train dispatch operations.