In taking its decisions, the Swiss federal office for civil aviation (FOCA) takes into consideration the international standards and recommended practices for the protection of the environment. Thus aircraft which are to be certified and registered in Switzerland need to fulfill the standards of environmental protection as stated in ICAO Annex 16 (annex to the Convention of International Civil Aviation).

In the particularly sensitive environmental problems (noise and gaseous emissions), Swiss FOCA has developed its own, more progressive standards and incentive system. To propose the necessary information to the users, the Swiss FOCA provides recommendations, models, databases and documentation.