1 Internal combustion engines... designed or modified for propelling aircraft or lighter-than-air-vehicles. 2 Specially designed components for the engines specified in sub-paragraph (1). 3 For the purposes of this paragraph— a “ internal combustion engines ” includes engines of axial piston and rotary piston type; b The following terms have the meaning given to them in the Dual-Use Regulation— “aircraft”; “airship”; “lighter-than-air vehicle”.