Cal. Food & Agric. Code § 74651.5

Prior to the beginning of each marketing season, the commission may establish a voluntary minimum assessment rate applicable to vintners who process winegrapes in the marketing season in a quantity of 100 tons or less and who are exempt from paying the assessment established pursuant to Section 74651. Notwithstanding any other provisions of this chapter, any vintner who voluntarily pays the minimum assessment shall be granted the same rights and privileges as vintners processing over 100 tons in that marketing season.