The aerodrome/ heliport of entry and departure for international air traffic, where all formalities concerning customs, immigration, health, animal and plant quarantine and similar procedures are carried out and where air traffic services are available on a regular basis.

 An aerodrome/ heliport available only for domestic air traffic, including those military aerodrome/heliport where civil air traffic is allowed under certain conditions. Information about national aerodromes might be obtained at the international aerodromes.