Cal. Food & Agric. Code § 79892

Following a hearing, and favorable referendum if required, the process specified in Section 79891 shall be conducted by the secretary every five years thereafter between July 1 and June 30 of the following year, unless a referendum is conducted as the result of a petition pursuant to Section 79893. In that case, the hearing, and referendum if required, shall be conducted every five years following the industry petitioned referendum.