California Code, Health and Safety Code - HSC § 5471

(a) In addition to the powers granted in the principal act, any entity shall have power, by an ordinance or resolution approved by a two-thirds vote of the members of the legislative body thereof, to prescribe, revise and collect, fees, tolls, rates, rentals, or other charges for services and facilities furnished by it, either within or without its territorial limits, in connection with its water, sanitation, storm drainage, or sewerage system.

(b) In addition to the powers granted in the principal act, any entity shall have power, pursuant to the notice, protest, and hearing procedures in Section 53753 of the Government Code, to prescribe, revise, and collect water, sewer, or water and sewer standby or immediate availability charges for services and facilities furnished by it, either within or without its territorial limits, in connection with its water, sanitation, storm drainage, or sewerage system.

(c) The entity may provide that the charge for the service shall be collected with the rates, tolls, and charges for any other utility, and that any or all of these charges may be billed upon the same bill. Where the charge is to be collected with the charges for any other utility service furnished by a department or agency of the entity and over which its legislative body does not exercise control, the consent of the department or agency shall be obtained prior to collecting water, sanitation, storm drainage, or sewerage charges with the charges for any other utility. Revenues derived under the provisions in this section, shall be used only for the acquisition, construction, reconstruction, maintenance, and operation of water systems and sanitation, storm drainage, or sewerage facilities, to repay principal and interest on bonds issued for the construction or reconstruction of these water systems and sanitary, storm drainage, or sewerage facilities and to repay federal or state loans or advances made to the entity for the construction or reconstruction of water systems and sanitary, storm drainage, or sewerage facilities. However, the revenue shall not be used for the acquisition or construction of new local street sewers or laterals as distinguished from main trunk, interceptor, and outfall sewers.

(d) If the procedures set forth in this section as it read at the time a standby charge was established were followed, the entity may, by ordinance or resolution adopted by a two-thirds vote of the members of the legislative body thereof, continue the charge pursuant to this section in successive years at the same rate. If new, increased, or extended assessments are proposed, the entity shall comply with the notice, protest, and hearing procedures in Section 53753 of the Government Code.