(a) A single-seat aeroplane that has a launch weight of 165 kg (363.8 lb) or less, and a wing area, expressed in square metres, of not less than the launch weight minus 15, divided by 10, and in no case less than 10 m2;

(b) a two-seat instructional aeroplane that has a launch weight of 195 kg (429.9 lb) or less, and a wing area, expressed in square metres, of not less than 10 m2 and a wing loading of not more than 25 kg/m2 (5.12 lb/ft2), the wing loading being calculated using the launch weight plus the occupant weight of 80 kg (176.4 lb) per person; or

(c) an advanced ultralight aeroplane.