In the interests of aviation safety, the release of more than 30 small balloons within a radius of 15 km of an airport or airfield, and - outside that radius - of more than 100 small balloons in the meaning of section 28(4) Aviation Act requires the prior authorisation of the respective provincial governor.
The release of balloons is prohibited in and below airport and airfield safety zones.
Responsible provincial authorities:
Niederösterreich (Lower Austria)
Oberösterreich (Upper Austria)