This standard BS EN 13718-1:2014+A1:2020 Medical vehicles and their equipment. Air ambulances is classified in these ICS categories:
11.040.01 Medical equipment in general
11.160 First aid
49.020 Aircraft and space vehicles in general
This European Standard specifies general requirements for medical devices carried in air ambulances and used therein and outside hospitals and clinics in situations where the ambient conditions can differ from normal indoor conditions. This European Standard does not cover the requirements for approval and registration of the vehicle and the training of the staff which is the responsibility of the authority/authorities in the country where the ambulance is to be registered.