The Air Navigation Order 1995

Flight times—responsibilities of flight crew

65.—(1) Subject to paragraph (2), a person shall not act as a member of the flight crew of an aircraft registered in the United Kingdom if at the beginning of the flight the aggregate of all his previous flight times:

(a) during the period of 28 consecutive days expiring at the end of the day on which the flight begins exceeds 100 hours; or

(b) during the period of twelve months expiring at the end of the previous month exceeds 900 hours.

(2) This article shall not apply to a flight made:

(a) in an aircraft of which the maximum total weight authorised does not exceed 1600 kg and which is not flying for the purpose of public transport or aerial work; or

(b) in an aircraft not flying for the purpose of public transport nor operated by an air transport undertaking, if at the time when the flight begins the aggregate of all the flight times of the aforesaid person since he was last medically examined and found fit by a person approved by the Authority for the purpose of article 22(8) does not exceed 25 hours.