California Code, Business and Professions Code - BPC § 25503.5

(a) A winegrower, beer manufacturer, or a beer and wine wholesaler may, without charge, instruct licensees and their employees, or conduct courses of instruction for licensees and their employees, on the subject of wine or beer, including, but not limited to, the history, nature, values, composition, and characteristics of wine or beer, the use of wine lists, and the methods of presenting and serving wine or beer.  The winegrower, beer manufacturer, or beer and wine wholesaler may furnish wine or beer and the equipment, materials, and utensils that may be required for use in connection with the instruction or courses of instruction.

(b) A craft distiller, distilled spirits manufacturer, distilled spirits manufacturer's agent, distilled spirits general rectifier, or distilled spirits general importer may, without charge, instruct licensees and their employees, or conduct courses of instruction for licensees and their employees, on the subject of distilled spirits, including, but not limited to, the history, nature, values, and characteristics of distilled spirits, and the methods of presenting and serving distilled spirits.  The craft distiller, distilled spirits manufacturer, or distilled spirits manufacturer's agent may furnish distilled spirits and the equipment, materials, and utensils that may be required for use in connection with the instruction or courses of instruction.

(c) The instruction or courses of instruction, authorized in subdivision (a) or (b), may be given at the premises of the winegrower, beer manufacturer, beer and wine wholesaler, craft distiller, distilled spirits manufacturer, distilled spirits manufacturer's agent, distilled spirits general rectifier, distilled spirits general importer, or of a licensee, including an on-sale retail licensee, or elsewhere.