What is unique about the locks utilized on devices for switches or derails?

The unique characteristic of the locks used on devices for switches or derails is that they must be uniquely tagged and secured by authorized personnel. This is crucial for maintaining safety and operational integrity in railroad operations. By ensuring that only authorized personnel have access to these locks, the risk of unauthorized manipulation of switches or derails is significantly reduced. This helps prevent accidents and enhances the overall safety of train movements.

Moreover, the requirement for unique tagging ensures that each lock can be clearly identified and tracked, which is essential for accountability and proper maintenance. It reinforces the importance of having designated individuals responsible for the operation and security of critical safety devices within the railroad system.