What action should be taken if a delay exceeds the expected timeframe?

Issuing a new Expected Further Clearance (EFC) prior to the expiration of the current EFC is crucial in maintaining effective communication and operational flow within air traffic control. When a delay exceeds the expected timeframe, the current EFC may no longer be accurate or relevant, leading to potential confusion for the pilot regarding their expected departure or re-entry into the airspace.

By providing a new EFC, the controller ensures that both the pilot and the air traffic management system have up-to-date information regarding the expected time of clearance. This action helps streamline operations, reduces uncertainty for the pilot, and enhances safety by clearly outlining what the pilot can expect moving forward. It also allows air traffic controllers to plan better for the flow of traffic, avoiding potential bottlenecks and ensuring that all necessary adjustments are communicated in a timely manner.

While notifying the pilot or changing the holding pattern may be part of the broader communication strategy, these actions do not directly address the need to manage expectations in terms of clearance time. Canceling the clearance would not be appropriate in this scenario, as it could lead to further complications and confusion.