California Code, Business and Professions Code - BPC § 25503.41

(a) Notwithstanding any other provision of this division, any person that both operates a winery in another state and produces distilled spirits in another state may hold an interest in no more than 12 brewpub-restaurant licenses, provided that all of the following conditions are met:

(b) The Legislature finds that it is necessary and proper to require a separation between manufacturing interests, wholesale interests, and retail interests in the production and distribution of alcoholic beverages in order to prevent suppliers from dominating local markets through vertical integration and to prevent excessive sales of alcoholic beverages produced by overly aggressive marketing techniques.  The Legislature further finds that the exception established by this section to the general prohibition against tied interests must be limited to its expressed terms so as not to undermine the general prohibition, and intends that this section be construed accordingly.