Cal. Water Code § 55652

The petition shall contain: (a) The boundaries of the proposed zone. (b) A general description of the improvement desired. (c) An estimate of the cost of the proposed improvement and of the incidental expenses in connection therewith. (d) Either: (1) A request that an election be called in the proposed zone for the purpose of submitting to the qualified voters thereof the proposition of establishing the zone and incurring a bonded indebtedness therein, the principal and interest of which shall be paid by special taxes levied on the taxable property in the zone, to pay the cost and expense of the proposed improvement; or (2) A request that an election be called in the proposed zone for the purpose of submitting to the qualified voters thereof the proposition of establishing the zone and fixing and collecting special rates or charges therein for the use and supply of water and applying the receipts therefrom to the cost and expense of the proposed improvement. If the petition contains such a request, it shall specify the maximum rate or charge permissible and the length of time during which the special rates or charges may be made.