Which action is prohibited until permission is granted from RCC?

Making moves within the interlocking is prohibited until permission is granted from the Region Control Center (RCC) because safety protocols require authorization for any actions that could impact train operations within critical areas. Interlockings are systems designed to prevent conflicting movements between trains, and allowing moves without proper authorization can lead to dangerous situations such as collisions or derailments.

Train operators must adhere to strict procedures to ensure the safety of both the trains and the infrastructure. Obtaining permission from the RCC ensures that all operational elements are accounted for and that the movement can be safely coordinated without jeopardizing the integrity of the interlocking system. This protocol emphasizes the importance of communication and authorization in the railway system to maintain safety standards.