What authority is needed for a work train extra to follow a TC417 into an automatic block?

In this scenario, a work train extra needs a specific authority to enter an automatic block after a TC417, which is a type of signal or indication used in rail operations. A Train Order serves as the official communication from the dispatcher, granting the required authority to proceed under conditions that may be different from regular operations, such as those involving signal restrictions or specific instructions related to work activities.

Train Orders are crucial because they convey clear instructions for movement, ensuring that all train crews are aware of any special conditions, restrictions, or permissions that affect their operation. This is especially important in the context of a work train, which may encounter unique circumstances that differ from regular train operations. By adhering to the Train Order, crews can ensure safety and compliance with operational protocols while effectively coordinating their movements in relation to other train activity on the line.