Except as otherwise provided in Section 59820, if any marketing program which is in active operation does not provide for a periodic referendum of producers of record with the department, directly affected by the program, for the purpose of determining whether or not the program shall be continued or modified, the director shall, prior to the beginning of a marketing season, conduct a referendum on the program at least biennially for the purpose of making the determination.
Ca. Food and Agric. Code § 59981