- Fédération Aéronautique Internationale (FAI)
- International Gliding Commission of the FAI (IGC)
- Organisation Scientifique Internationale du Vol à Voile (OSTIV)
- Europe Air Sports (EAS)
- European Aviation Safety Agency (EASA)
- Eurocontrol
- Joint Aviation Authorities (JAA)
- Austrian Aero Club (ÖAC)
- Belgian Gliding Federation (LVZC-FCFVV)
- British Gliding Association (BGA)
- Danish Soaring Association(DSvU)
- Dutch Gliding Association (KNVvl)
- Fédération Française de Vol à Voile (FFVV)
- Finnish Aeronautical Association (SIL)
- Gliding Commission of the German Aeroclub (DAeC)
- Italian Gliding Federation (FIVV)
- Norvegian Gliding Association (NAK)
- Polish Aeroclub(ACP)
- Slovakian National Aeroclub (SNA)
- Spanish National Aeroclub (RACE)
- Swedish Soaring Federation (Segelflyget)
- Swiss Gliding Federation (SFVS)
