California Code, Revenue and Taxation Code - RTC § 32455

It is unlawful for the board or any person having an administrative position under this part to make known in any manner whatever any information set forth or disclosed in any report from any winegrower pursuant to this part regarding the names of the purchasers and the amounts of individual sales of wines which the winegrower has exported from this state, or to permit the portion of any report or copy thereof which contains such information to be seen or examined by any person. This section does not prohibit the publication by the board of any winegrower's total receipts from the export of wines from this state.

Nothing in this section shall prevent the board from exchanging with officials of other states information concerning the interstate shipments of wine.