What would a CE need in 251 territory to run Against the Current of Traffic?

In 251 territory, running against the current of traffic requires specific protocols to ensure safety and compliance with operating rules. The correct choice highlights the essential need for a train order, which facilitates the legal and operational framework necessary for this maneuver. This enables the engineer (CE) to receive explicit instructions regarding their movement and any pertinent details about the route being traversed.

Equally important is the condition of the block. This refers to the current status of the track ahead, ensuring that it is clear and safe for the train to proceed against the flow of traffic. Understanding the conditions of the block helps to mitigate risks associated with conflicting movements, as operating against the current inherently carries increased hazards.

The elements included in this option ensure that the engineer is fully informed of both the operational parameters and the physical conditions on the track, enabling safe and efficient train operations. Other choices may involve important aspects of train operations, but they do not fully encompass the necessary elements for running against the current of traffic in 251 territory.