Cal. Food & Agric. Code § 79703
(c) The secretary shall establish a referendum period, which shall not be less than 10 or more than 60 days in duration. The secretary may prescribe additional procedures necessary to conduct the referendum. At the close of the established referendum period, the secretary shall tabulate the ballots filed during the period. The secretary shall suspend the operation of this chapter, if the secretary finds that at least 30 percent of the total number of producers from the list established by the secretary participate, and that either of the following occurs: