Convention on International Civil Aviation of 1944 г.
Eurocontrol International Convention relating to Cooperation for the Safety of Air Navigation
Ordinance № 847 of 15.01.2010 establishing a national procedure for granting Community air carriers established in the Republic of Bulgaria access to the market for air services agreed under the Republic of Bulgaria's international agreements with countries outside the European Union - BG text
Ordinance № 22 of 21.07.1999 on flights in the airspace and from/to the airports of the Republic of Bulgaria
Commission Regulation (EU) No 452/2014 of 29 April 2014 laying down technical requirements and administrative procedures related to air operations of third country operators pursuant to Regulation (EC) No 216/2008 of the European Parliament and of the Council