Cal. PUC § 12815.4

The petition shall declare that the public interest or necessity demands that a special election be called by the board of directors for the purpose of submitting to the voters of the district the proposition as to whether or not the voters approve the addition of fluorine and fluorine compounds to the public water supply of the district. The petition may be presented in sections, but each section shall contain a declaration of public interest or necessity, and shall have attached thereto an affidavit substantially in the same form as set forth in Section 9022 of the Elections Code. In addition, each section shall be designed as set forth in Section 9020 of the Elections Code.