Openings in milkhouse.

1. The milkhouse may not contain openings to the outside except for windows and doors which are tight-fitting, self-closing, solid and open outward. 2. The milkhouse must not open directly into any barn, stable or room used for domestic purposes, except that an opening between the milkhouse and the milking barn, stable or parlor is permitted through a passageway. The door which opens into such a passageway must be a solid, self-closing, tight fitting door.