The bottling room must be separated from other operations and storage areas by tight walls, ceilings and self-closing doors, unless the bottles are washed and filled within a machine that provides a filtered and positive flow of air which prohibits exposure of the bottles to air outside the machine. The opening in the room for any conveyor must not exceed the size which is required to permit passage of the containers.
Nev. Admin. Code § 445A.564
NRS 439.200