Furthermore, all European countries are obliged by the EU applicable legislation to reorganise their national air spaces into major functional blocks of air, in order to facilitate the flight of aircraft and increase effectiveness and safety.
Pored toga, sve evropske zemlje obavezne su, prema primenljivim zakonima EU, da reorganizuju svoje nacionalne vazdušne prostore u velike funkcionalne vazdušne blokove, kako bi se olakšalo letenje aviona i povećala efikasnost i bezbednost.