What should a pilot be requested to do when issuing a clearance void time at an airport not served by a tower?

When a clearance void time is issued at an airport that is not served by a tower, the pilot is required to advise Air Traffic Control (ATC) of their intentions no later than 30 minutes after that clearance void time if they have not yet become airborne. This requirement is in place to ensure that ATC has updated information regarding the pilot's intentions, enhancing overall safety and coordination.

The concept of a clearance void time is crucial for ensuring that traffic flow and safety are managed efficiently, especially at uncontrolled airports where there is no direct oversight by ATC. By requiring the pilot to report their intentions within a specific timeframe, it allows ATC to track the situation and make necessary adjustments if the pilot has not taken off, thereby maintaining operational integrity and safety.

This requirement reflects standard procedures and best practices in aviation to ensure proper communication and situational awareness between pilots and ATC in non-towered environments.