Administrative Rules of Montana
Department 32 - LIVESTOCK
Chapter 32.9 - GENERAL LICENSING AND PROVISIONS
Subchapter 32.9.4 - Manufactured Dairy Products Plants - General Requirements
Rule 32.9.402 - OPENINGS TO OUTSIDE

(1) All openings to the outer air, including doors, windows, skylights, and transoms, must be effectively protected or screened against the entrance of flies and other insects, rodents, birds, dust, and dirt. All outside doors opening into processing rooms must be in good condition and fit properly. All hinged, outside screen doors shall open outward. All doors and windows must be kept clean and in good repair. Outside conveyor openings and other special-type outside openings must be effectively protected to prevent the entrance of flies and rodents, by use of doors, screens, flaps, fans, or tunnels. Outside openings for sanitary pipelines must be covered when not in use. On new construction, window sills should be slanted downward at a 45° angle.