Mo. Rev. Stat. § 196.190
Every building, room, basement, or cellar occupied or used as a bakery, confectionery, cannery, packinghouse, slaughterhouse, restaurant, hotel, dining car, grocery, meat market, dairy, creamery, butter factory, cheese factory, or other place or apartment used for the preparation for sale, manufacture, packing, storage, sale or distribution of any food, shall be properly lighted, drained, plumbed and ventilated and conducted with strict regard to the influence of such condition upon the health of the operatives, employees, clerks or other persons therein employed, and the purity and wholesomeness of the food therein produced; and for the purpose of sections 196.190 to 196.265, the term "food", as used herein, shall include all articles used for food, drink, confectionery condiment, whether simple, mixed or compound, and all substances or ingredients used in the preparation thereof.
§ 196.190, RSMo