For a scheduled flight time greater than 9 hours, what is the required rest period?

For scheduled flight times greater than 9 hours, regulatory guidance stipulates that pilots must have a rest period of 10 hours before reporting for duty. This rest period is essential to ensure that pilots are well-rested and fit for duty, maintaining safety during operation. Such guidelines have been established to help mitigate fatigue and enhance performance, as extended flight times may lead to increased physical and mental strain.

While other options might seem plausible, they do not meet the specific requirements set forth for long-duration flights. The regulation is focused on establishing a standard that provides pilots enough time to recuperate adequately, which underscores the importance of 10 hours in this context.