What should be done if unapproved cargo is rejected for transportation?

The appropriate action to take when unapproved cargo is rejected for transportation is to contact operational control. This step is crucial as operational control is responsible for the oversight and coordination of flight operations, ensuring safety and compliance with regulations. By notifying operational control, you enable them to manage the situation effectively, which may involve advising on further actions such as re-routing, handling procedures, or communicating with the sender about the rejected cargo. This helps maintain safety protocols and ensures that any potential issues with the cargo are addressed in accordance with company policy and regulatory requirements.