Section 19.491 - Marks on containers of specially denatured spirits(a)General. A proprietor must mark or label each package, case, or encased container of specially denatured spirits filled on bonded premises to show: (1) The quantity in gallons;(2) The serial number or lot identification number;(3) The plant number of the proprietor;(4) The designation or abbreviation of the specially denatured spirits by kind (alcohol or rum);(5) The applicable formula number; and(6) The proof of the spirits, if they were denatured at other than 190 proof.(b)Bottles. A proprietor must mark or label each bottle to show the information prescribed in paragraphs (a)(1), (3), (4), (5), and (6) of this section.(c)Alternate formulations. When spirits are denatured under a formula authorizing a choice of types and quantities of denaturants, the proprietor must mark the container or case to show the actual types and quantities of denaturants used.