What must you obtain to make a reverse movement beyond block limits in 251 Territory?

To make a reverse movement beyond block limits in 251 Territory, it is essential to obtain Track Authority. This is a key aspect of railway operations and safety, ensuring that a train has the right to occupy and reverse on a track section. In 251 Territory, which operates under specific rules and regulations, obtaining Track Authority provides necessary permission for the movement while ensuring coordination with other trains and track operations.

Track Authority is designed to prevent conflicts and ensure the safety of all movements on the railway. It is critical in a 251 Territory environment where multiple trains may be operating on the same track section. This authority is usually granted by the dispatcher or signaling system, and it's a fundamental requirement in order to maintain safe and efficient train movement and management. While signal clearance, permission from the conductor, or dispatcher approval may play roles in various situations, they do not specifically confer the right to make a reverse movement beyond block limits as Track Authority does.