California Code, Food and Agricultural Code (Formerly Agricultural Code) - FAC § 33518

A suitable milkhouse or room, which is properly screened to exclude flies or insects shall be provided and maintained for the separating, cooling, mixing, canning, and keeping, or otherwise caring for, the milk and cream. The milkhouse or room shall contain a two-compartment wash sink. The milkhouse or room shall not be used for any other purpose. It shall not be located in, or be a part of, any building in which fowls or animals, except milking cows, are housed, or be a part of any room where milking cows are held, or a part of, or communicate with, any room or place which is used by any person for sleeping or living accommodations.