Public gatherings of more than five people without prior official permission are illegal.

All civil and military operations require 24 hours' prior permission.

"What would happen if an airplane landed without prior permission?"

Under 18 were allowed to skate with prior permission from a manager.

Nothing I heard was recorded or used without prior permission.

Many are on public ground and can be visited without obtaining prior permission.

The facility is not open to the public without prior permission.

Anybody in the village can use his land without taking any prior permission.

Failure to obtain prior permission can result in a fine of $500 to $5,000.

The airport is available to pilots only with prior permission.