What is required if a flight time extension exceeds 30 minutes?

When a flight time extension exceeds 30 minutes, there are specific regulatory requirements to ensure the safety and well-being of flight crews. The correct requirement under regulations such as those from the FAA or similar aviation authorities is that the flight crew must have a mandatory rest period after extended flight hours. In this scenario, a flight time extension exceeding 30 minutes necessitates a minimum of 30 hours of rest before the crew can operate again.

This increased rest requirement helps to mitigate fatigue, which is crucial for maintaining high levels of alertness and performance during flight operations. Adequate rest is essential for the safety of both the crew and passengers, as it reduces the chances of human error that can arise from fatigue. Thus, the answer reflecting this regulatory requirement is indeed 30 hours of rest, emphasizing the importance of managing crew fatigue effectively.