Article 4 Application of Order
This Order shall apply to—
every propeller driven aeroplane having a maximum total weight authorised of 9,000kg or less;
every aeroplane which is capable of sustaining level flight at a speed in excess of Flight Mach 1.0, being an aeroplane in respect of which applicable standards are specified in article 6(9) of this Order;
every microlight aeroplane;
every other subsonic aeroplane which in accordance with its certificate of airworthiness has a take-off distance required, at maximum total weight authorised on a hard level runway in still air in an International Standard Atmosphere at sea level, of more than 610 metres;
every helicopter, being a helicopter in respect of which applicable standards are specified in article 6(10) of this Order.