The providing of adequate public parking places in cities largely depends upon the formation of parking districts. Such districts will be created and will be successful only if so operated as to serve adequately the property within the district. It is the intent of this part, 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, that the owners of real property in a parking district created pursuant to this part to provide parking places to solve the parking problems of the district may receive preferential rates, charges, or rentals for themselves, their tenants, and the classes of persons who call upon or do business with them, all to the end that the property which bears the burden and provides a solution for the parking problem shall receive a special benefit.