Mo. Rev. Stat. § 265.390: Containers to bear inspection mark and plant number — containers to state ingredients, net weight or measure.

1. When any meat or meat product which is prepared for human consumption shall be placed in a shipping container in a commercial plant where inspection is maintained under sections 265.300 to 265.470, the person preparing the meat or meat product shall cause to be attached to the container a label bearing the official inspection mark and the approved plant number.

2. In addition, the container which directly contains the meat or meat product shall bear a statement of the ingredients including a declaration of artificial flavors, colors, or preservatives, net weight or other measure of contents and the official inspection mark.