`The Bulgarian Civil Aviation Administration assumed responsibility for facilitating the flights in connection with the request for air corridors,` Civil Aviation Administrative Director Zakhari Aleksiev said, quoted by the Bulgarian National Radio. The flights of the aircraft will take place in accordance with the generally accepted rules of the International Civil Aviation Organization. A flight plan has to be filled and submitted before the start of every single flight. Each flight will be received by the air traffic control organs through the integrated system for processing flight plans in Europe. Apart from the flight plan, the air traffic control organs will receive information on the main flights over direct telephone lines. Flights to main destinations will be controlled by the rules for control of civilian aircraft.