California Code, Business and Professions Code - BPC § 23673

No brand owner of distilled spirits or his agent shall sell any brand of distilled spirits to a wholesaler or rectifier in this state at a price higher than the lowest price at which such brand of distilled spirits is sold by such brand owner or his agent to any wholesaler or rectifier during any calendar month anywhere in any other state or in the District of Columbia or to any state or state agency which owns or operates retail distilled spirits stores.

In determining the lowest price for which any brand of distilled spirits is sold in any other state or the District of Columbia or to any state or state agency which owns and operates retail distilled spirits stores, appropriate reduction shall be made to reflect all discounts, all rebates, allowances, and other inducements of any kind whatsoever offered or given to any such wholesaler or state, or state agency, as the case may be, purchasing such brand of distilled spirits in such other state or in the District of Columbia or to the state or state agency which owns or operates retail distilled spirits stores;  provided that nothing in this section shall prevent differentials in price which make only due allowance for differences in state excise taxes and fees and the actual cost of delivery.  As used in this section, the term “excise taxes and license fees” shall mean the excise taxes imposed or the fees required by any state or the District of Columbia.

A violation of this section shall be remediable only by a civil action for damages or an action to enjoin a brand owner or his agent from continued violation brought by any person suffering loss as a result of such violation.  A judgment in any such action rendered against a licensee shall be deemed grounds for the suspension or revocation of the violator's license pursuant to Chapter 7 (commencing with Section 24200) of this division.

For the purposes of this section, “distilled spirits” does not include brandy produced in California.  No California brandy manufacturer or his agent shall be required to file an affidavit pursuant to this section for California brandy.