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...Feb aip belgium and luxembourg enr flight planning civil requirement to submit a plan sera information relative an intended or portion of be provided ats units shall in the form submitted prior operating any ifr b thereof with atc service c above fl d at night if leaving vicinity aerodrome e across international borders vfr flights remaining within schengen area do not need as far brussels fir is concerned for requirements applicable other states please consult relevant it advisable file when flying over sparsely populated areas where sar operations would difficult aircraft equipped radio may filed order facilitate provision services note pilot who has departing from private responsible forwarding associated messages either by tel unit which was sent categories distinction made between three different full departure line formatting below accordance procedures specified during afil abbreviated limited purpose obtain clearance minor such cross ctr take off land controlled transmitted air...