กิจกรรมบริการต่าง ๆ สำหรับการขนส่งทางอากาศ

This class includes:
- activities related to air transport of passengers, animals or freight:
* operation of terminal facilities such as airway terminals etc.
* airport and air-traffic-control activities
* ground service activities on airfields etc.

This

This class excludes:
- cargo handling, see 5224
- operation of flying schools, see 8530, 8549