64.—(1) A person shall not act as a member of the crew of an aircraft to which this article applies if he knows or suspects that he is suffering from, or, having regard to the circumstances of the flight to be undertaken, is likely to suffer from, such fatigue as may endanger the safety of the aircraft or of its occupants.
(2) A person shall not act as a member of the flight crew of an aircraft to which this article applies unless he has ensured that the operator of the aircraft is aware of his flight times during the period of 28 days preceding the flight.