When a Mandatory Directive is issued by telephone outside of the initial terminal, what is crucial before providing the time effective?

When a Mandatory Directive is issued by telephone outside of the initial terminal, it is crucial that the copying employee ensures that the directive has been acknowledged by the engineer before providing the time effective. This step is vital because it confirms that the engineer has received and understood the directive, which is critical for safety and operational effectiveness. Acknowledgment ensures that all parties involved are aware of the instructions and can act accordingly, reducing the risk of miscommunication that could lead to operational errors or safety violations.

While other actions may be important in different contexts, the confirmation of acknowledgment is specifically required to ensure that the engineer is fully aware of the directive's content and implications. This direct acknowledgment also facilitates effective communication and compliance with safety protocols, which is a key consideration in railway operations.