A person F1(P) must not act as a member of the crew of an aircraft to which this article applies if F2P knows or suspects P is suffering from or, having regard to the circumstances of the flight to be undertaken, F3is likely to suffer from, such fatigue as may endanger the safety of the aircraft or of its occupants.

A person must not act as a member of the flight crew of an aircraft to which this article applies without first ensuring that the operator of the aircraft is aware of their flight times during the period of 28 days preceding the flight.