California Code, Business and Professions Code - BPC § 23356.1

(a) A winegrower's license also authorizes the person to whom issued to conduct winetastings of wine produced or bottled by, or produced and packaged for, the licensee, either on or off the winegrower's premises.  When a winetasting is held off the winegrower's premises at an event sponsored by a private nonprofit organization, no wine may be sold, and no sales or orders solicited, except that orders for the sale of wine may be accepted by the winegrower if the sales transaction is completed at the winegrower's premises.  For purposes of this subdivision, “private nonprofit organization” means an organization described in Section 23701a, 23701b, 23701d, 23701e, 23701f, 23701g, 23701i,23701k, 23701l, 23701r, or 23701w of the Revenue and Taxation Code.

(b) Notwithstanding any other provisions of this division, a winegrower who, prior to July 1, 1970, had, at his or her premises of production, sold to consumers for consumption off the premises domestic wine other than wine which was produced or bottled by, or produced and packaged for, the licensee, and which was not sold under a brand or trade name owned by the licensee, and who had, prior to July 1, 1970, conducted winetastings of the domestic wine at his or her licensed premises, is authorized to continue to conduct the winetasting and selling activities at the licensed premises.

(c) A winegrower who was licensed as such prior to July 1, 1954, and who prior to July 1, 1970, had, at his or her licensed premises, sold to consumers for consumption off the premises, wine packaged for and imported by him or her, and who conducted winetastings of the wines at his or her licensed premises, may continue to conduct the winetasting and selling activities at the licensed premises.

(d) The department may adopt the rules as it determines to be necessary for the administration of this section.