For how long is the station copy of the CLR retained at the station?

The station copy of the CLR (Clearance) is retained at the station for 24 hours. This retention period is crucial for maintaining operational safety and accountability. By keeping the CLR for this duration, the station ensures that there is a reliable reference for any potential audits, inquiries, or discrepancies that might arise within that time frame. It allows station personnel to access the necessary information to verify operations, confirm clearances issued to aircraft, and ensure compliance with regulatory requirements. The 24-hour retention period strikes a balance between operational efficiency and the need for record-keeping, ensuring that all relevant data is at hand when needed.