Performance applicability — aeroplanes
80.—(1)  An AOC holder must ensure that any small aeroplane that corresponds to one of the following descriptions is operated in accordance with the specified circumstances:
(a)a multi-engine aeroplane that is powered by at least one turbo‑propeller engine, and has an MAPSC exceeding 9 but not exceeding 19, must be operated in accordance with Performance Class A;
(b)a multi-engine turbine-powered aeroplane must be operated in accordance with Performance Class A;
(c)a propeller-driven aeroplane with an MAPSC not exceeding 9 and an MCTOM not exceeding 5,700 kg must be operated in accordance with Performance Class B;
(d)a single-engine aeroplane must not be operated in Instrument Meteorological Conditions or at night;
(e)a two-engine aeroplane which does not meet the climb performance specified in Performance Class B must not be operated in Instrument Meteorological Conditions or at night.
(2)  Despite paragraph (1) —
(a)where full compliance with the requirements in paragraph (1) cannot be shown due to specific design characteristics of the aeroplane, an AOC holder may apply performance standards —
(i)that ensure a level of safety equivalent to the appropriate Performance Class; and
(ii)that are approved by the Director‑General of Civil Aviation; and
(b)an AOC holder may operate —
(i)a single-engine aeroplane that is not turbine‑powered, and an aeroplane described in paragraph (1)(e) on a special VFR flight in a control zone; and
(ii)a single-engine turbine-powered aeroplane in accordance with regulation 65(2).