Composition of crew
104.—(1)  A person must not operate an aircraft unless —
(a)in the case of a flight mentioned in regulation 3(1)(a) or (b), the aircraft carries a flight crew of the number and description specified in the Certificate of Airworthiness or flight manual; or
(b)in the case of a flight mentioned in regulation 3(1)(c), the aircraft carries a flight crew of the number and description required by the aircraft’s State of Registry.
(2)  Subject to paragraph (3), an operator mentioned in regulation 3(1)(a) or (b) must not operate an aircraft along any route where the route (including any diversion from the route) —
(a)is intended to pass over any part of an area specified in the Fifth Schedule; or
(b)includes any point which is more than 500 nautical miles from the point of take‑off as measured along the route to be flown.
(3)  In the circumstances mentioned in paragraph (2), the operator may operate an aircraft if —
(a)the aircraft includes a flight navigator as an additional flight crew member; or
(b)the aircraft is fitted with navigational equipment approved by the Director‑General of Civil Aviation and which is to be used in accordance with the conditions subject to which that approval was given.