Nature of test
3. The appropriate test referred to in paragraph 2—
(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 or co-pilot (or both) of aircraft of the type, types or class specified in the certificate—
(i)is a test of the pilot’s competence to fly the aircraft as pilot in command or co-pilot (or both); and
(ii)must where the CAA so specifies for the whole or part of a test, be conducted in an aircraft in flight or by means of a flight simulator approved by the CAA.
(b)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 (gyroplanes), an assistant flying instructor’s rating (gyroplanes) or an instrument meteorological conditions rating (aeroplanes) relate—
(i)is a test of the holder’s ability to perform the functions to which the rating relates; and
(ii)must where the CAA so specifies for the whole or part of the test, be conducted in an aircraft in flight.