Cal. Business and Professions Code § 23508

(a) A licensed craft distiller may also have upon its licensed premises all beers, wines, and distilled spirits, regardless of source, for sale or service only to guests during private events or private functions not open to the general public. Alcoholic beverage products sold at the premises that are not manufactured or produced and bottled by, or manufactured or produced and packaged for, the licensed craft distiller shall be purchased by the licensed craft distiller only from a licensed wholesaler. (b) A licensed craft distiller may sell all beers, wines, brandies, or distilled spirits to consumers for consumption on the premises in a bona fide eating place as defined in Section 23038, which is located on the licensed premises or on premises owned by the licensee that are contiguous licensed premises and which is operated by and for the licensee, provided that any alcoholic beverage products not manufactured or produced by the licensee must be purchased from a licensed wholesaler. Beer, wine, and brandy may be used in the preparation of food and beverages in the bona fide public eating place for consumption on the premises. (c) Notwithstanding any other provision of this division, in the event that the licensee no longer qualifies as a craft distiller due to the amount of distilled spirits reported pursuant to Section 23502, the licensee may continue to hold the privileges granted by this section.