Mo. Rev. Stat. § 265.286
On each quarter, half or whole carcass of imported fresh meat offered for sale at wholesale or retail, and also on any individually wrapped or packaged cut or portion thereof, there shall either be placed a label or brand clearly indicating the country of origin of the meat or a conspicuous, legible and clearly visible sign indicating the country of origin of the meat. Where unwrapped or unpackaged cuts or slices are displayed in a tray or case for selection by the patron, each tray or case shall have a conspicuous, legible and clearly visible sign or label indicating the country of origin. Every tray or other container of hamburger, ground meat, sausage, or other fresh meat displayed in the bulk shall have a sign or label conforming to the same requirements. All signs required by this section* shall be placed to clearly indicate for which cuts of meat or trays of meat such sign is intended.
§ 265.286, RSMo