3. The appropriate test referred to in paragraph 2 of this Part of this Schedule shall be:
(a)in the case of a test which entitles the holder of the licence of which the certificate forms part to act as pilot in command and/or co-pilot of aircraft of the type specified in the certificate, a test of the pilot’s competence to fly the aircraft as pilot in command and/or co-pilot and shall where the Authority so specifies in respect of the whole or part of a test be conducted in an aircraft in flight or by means of a flight simulator approved by the Authority;
(b)in the case of a test which entitles the holder of the licence of which the certicate forms part to act as flight engineer of aircraft of the type specified in the certificate, a test of the flight engineer’s competence to perform the duties of a flight engineer in the type of aircraft to be used on the flight and shall, where the Authority so specifies in respect of the whole or part of the test, be conducted in an aircraft in flight or by means of a flight simulator approved by the Authority;
(c)in the case of a test which entitles the holder of the licence of which the certificate forms part to perform the functions to which an Instrument Rating relates a test of his ability to perform the functions to which the rating relates and shall, where the Authority so specifies in respect of the whole or part of the test, be conducted in an aircraft in flight or by means of a flight simulator approved by the Authority;
(d)in the case of a test which entitles the holder of the licence of which the certificate forms part to perform the functions to which a flying instructor’s rating, an assistant flying instructor’s rating or an instrument meteorological conditions rating relates, a test of his ability to perform the functions to which the rating relates and shall where the Authority so specifies in respect of the whole or part of the test be conducted in an aircraft in flight.