47 Pa. Stat. § 5-510
All persons, except as exempted by section five hundred two hereof, manufacturing, producing, distilling, developing or using in the process of manufacture, denaturing, redistilling, recovering, rectifying, blending, reusing, holding in bond, holding in storage as bailee for hire, or transporting for hire of alcohol or liquor under the provisions of this article, shall securely and permanently attach to every container ready for shipment thereof as the same is manufactured, produced, distilled, developed, denatured, redistilled, recovered, rectified, blended, reused, a label stating the name of the manufacturer, kind and quantity of alcohol or liquor contained therein, and the date of its manufacture, together with the number of the license authorizing the manufacture thereof, and all persons possessing such alcohol or liquor in wholesale quantities shall securely keep and maintain such label thereon.
47 P.S. § 5-510