It shall be unlawful to handle milk, cream, butter, frozen desserts, or other dairy products in unclean or insanitary places, or in any insanitary manner, or to keep, store, or prepare for market any cream, milk, or other dairy products in the same enclosure with any hide or fur house, or any cow, horse, or hog barns or sheds, or other places where livestock or poultry are kept, housed, or handled, or in rooms or buildings used as gasoline or oil filling stations, except as the sealed final product. Cream or milk receiving and buying stations located in connection with produce houses where poultry or fur and hides, rabbits, etc., are purchased or in connection with restaurants or living quarters shall be separated by a solid wall such as plaster, brick, or tongue and groove or other tight lumber. Self-closing solid connecting doors may be used between cream rooms and other rooms provided that cream rooms are adequately ventilated. Inside walls and ceilings of cream stations shall be painted annually with light-colored waterproof paint. Where water systems are available, running water shall be provided for cleaning purposes. Cream rooms must be used exclusively for the handling of dairy products.