5.4. Agreement between the European Community, the European Space Agency and the European Organisation for the Safety of Air Navigation on a European Contribution to the Development of a Global Navigation Satellite System (GNSS) - European Air Law View the chapter 5.4. Agreement between the European Community, the European Space Agency and the European Organisation for the Safety of Air Navigation on a European Contribution to the Development of a Global Navigation Satellite System (GNSS) by - European Air Law 5.4. Agreement between the European Community, the European Space Agency and the European Organisation for the Safety of Air Navigation on a European Contribution to the Development of a Global Navigation Satellite System (GNSS)