California Code, Streets and Highways Code - SHC § 35560

The commission may fix, regulate, and collect rentals, fees, or other charges for the use of parking places under its control, and  may provide different rates for different classes of customers, or users, provided that such rentals, fees or other charges shall be sufficient to produce funds to comply with the terms of the ordinance, resolution, or indenture providing for the issuance of bonds.  Such rentals, fees, or other charges shall be fixed after public hearing following such notice as the commission may prescribe.