If the ordinance, resolution, or indenture providing for the issuance of the bonds provides for the levy of an ad valorem assessment upon the taxable real property in the district, any lease or contract may provide that the use of the parking places shall be restricted, or partially restricted, to owners and tenants of real property in the district, and classes of persons designated by them, and may provide for maximum rates, charges, or rentals for such persons which differ from and are less than the maximum rates, charges, or rentals charged other persons.