Cameras attached to drones fall foul of Sweden’s strict surveillance laws, the country’s highest court has ruled by slapping an outright ban on drone filming—unless the kit is used by a law enforcement agency or an expensive permit has been issued.

The Supreme Administrative Court of Sweden ruled that all drone cameras count as surveillance devices, and that they can now only be used to prevent crime or accidents. In a linked ruling, it decided that car- or bike-mounted cameras are legally fine.

The difference? A camera mounted on a helmet or handlebars, or behind a windshield, goes where its owner goes, but as drones are remotely operated, this means they are capable of spying on things that are otherwise out of sight of their pilot, and are therefore illegal.