Which statement best describes when plastic covers may be used on exterior portions of the airport?

Answer: A — Yes, to cover cargo pallets or containers that are completely netted

Plastic covers on exterior portions are allowed only when they cover cargo pallets or containers that are completely netted. The netting provides a secure base so the cover stays in place and doesn’t flap loose, posing a hazard to people and aircraft equipment. This rule focuses on preventing windblown debris and protecting the cargo, rather than giving blanket permission for any exterior use. So, the best description is that plastic covers may be used to cover completely netted cargo pallets or containers, not for general exterior use or for protecting equipment that isn’t netted.