Cal. Food & Agric. Code § 77498.5

Following a hearing, and favorable referendum if required, conducted prior to January 31, 2000, the process specified in Section 77498 shall be conducted by the commission every fifth year thereafter between February 1 and June 30, unless a referendum is conducted as the result of a petition pursuant to Section 77499. In that case, the hearing, and referendum if required, shall be conducted every fifth year following the industry petitioned referendum.