What must the conductor and operator have before acting on a mandatory directive?

The conductor and operator must each have a written copy of the mandatory directive before taking action. This requirement ensures that both individuals have a clear and formal acknowledgment of the instructions relayed by the dispatcher. Having a written copy minimizes the risk of misunderstandings or mistakes that could arise from memory lapses or misinterpretations of verbal communications, ensuring that both parties are aware of the specifics of the directive and are operating under the same understanding.

In railway operations, adherence to protocols and assurances of clarity can significantly affect safety and operational efficiency. The use of written directives provides a tangible reference that can be reviewed, which is critical in a high-stakes environment where precision and compliance are paramount. Written directives also serve as documentation for accountability, should any issues arise regarding compliance with the mandatory directive.