If two train orders indicate a meet but change based on the right over distance, what happens to the eastern-bound train?

When two trains have orders that indicate a meet but the orders change due to the rights over distance, it means that the operational hierarchy or priority of the trains has shifted. In this scenario, if the eastern-bound train's order is adjusted to grant it the right of way, it would regain its superiority over the other train. This superiority allows it to continue its journey, typically resulting in more efficient operations and reduced delays.

Restoring the eastern-bound train's superiority signifies that it now has actual priority for movement as per the updated orders. This is essential for maintaining safe and effective train operations, as it dictates how each train behaves in relation to the other.

The other choices do not align with the operational procedures. The eastern-bound train does not need to remain stationary — it is prepared to move since it has regained its superiority. It also does not need to request permission to move, as it has the right of way. Lastly, the train being canceled is not applicable in this context unless there is a more significant issue affecting its service.