Cal. Bus. & Prof. Code § 25503.2
(a) Notwithstanding any other provision in this division, any winegrower, wine blender, beer manufacturer, brandy manufacturer, distilled spirits manufacturer, distilled spirits manufacturer’s agent, rectifier, distilled spirits wholesaler, and beer and wine wholesaler, or the authorized agent or agents or representative or representatives of that licensee, may perform any of the following services for off-sale retail licensees at or on the licensed premises of the off-sale retail licensee where the licensee sells alcoholic beverages with the retail licensee’s permission: