This is an essential part of the Single European Aviation Market which was created in the early 1990s, guaranteeing that airlines are entitled to operate under the same conditions anywhere in the EU.
Tegemist on 1990. aastate alguses loodud Euroopa ühtse lennundusturu ühe põhinõudega, millega kõigile ELi lennuettevõtjatele tagatakse ühtsed tingimused lennuteenuste osutamiseks.