When can additional equipment enter or leave out-of-service Limits?

The correct choice indicates that additional equipment can enter or leave out-of-service limits only after receiving permission from the employee in charge. This requirement is in place to ensure that safety and operational protocols are followed. The employee in charge is typically responsible for overseeing the area and assessing any potential hazards or issues before allowing additional equipment to move in or out. This process is crucial to maintain order and ensure that all safety measures are adhered to, thereby minimizing risks during operations.

In practice, this means that communication and coordination are essential when handling equipment in out-of-service limits. The employee in charge will have the most current information on the conditions and requirements for safe operations, ensuring that any movement is appropriately managed. This procedural step is vital in preventing accidents and ensuring a smooth operation within the railway environment.