What is the smoking regulation for vehicle operators while on the airside?

The regulation regarding smoking for vehicle operators while on the airside specifies that smoking is permitted only in designated smoking shelters. This rule is in place to maintain safety and reduce fire hazards in an environment where flammable materials and aircraft are present. Designated smoking shelters are chosen to be away from critical operational areas to ensure that smoking does not pose a risk to airport operations or surrounding personnel.

By allowing smoking only in these specific areas, the regulation helps mitigate potential risks associated with fire and ensures compliance with overall airport safety standards. The other options imply a more lenient stance on smoking, which would contradict the necessary safety measures established in airside operations.