Authorisation shall be granted in accordance with Article 4 letter a or c if the planned application is not expected to endanger the environment. This authorisation is for a limited period and for a specific geographical area.20
Authorisation granted in accordance with Article 4 letter b shall be limited in time and geographical scope and only granted if, in the case of the planned application:
application from the ground is not feasible or application from the air is associated with advantages for the protection of human health or the environment;
the aviation company uses aircraft and equipment with state-of-the-art technology for the protection of human health and the environment; and
there is no reason to fear any risk to human health and the environment.21
Authorisations shall only be granted to persons who are domiciled or have a registered office in Switzerland or in a member state of the European Union (EU) or the European Free Trade Association (EFTA).