Removal and impounding of vehicles under this article shall be done only by approved storage garages that shall be designated from time to time by the Council of the City of Pottsville. Every such garage shall submit evidence to the Council of the City of Pottsville that it is bonded or has acquired liability insurance in an amount satisfactory to the Council of the City of Pottsville as sufficient to indemnify owners of impounded vehicles against loss or damage to those vehicles while in the custody of the garage keeper for the purpose of towing or storage. The approved storage garage shall submit to the Council of the City of Pottsville its schedule of charges for towing and storage of vehicles under this article, and when the schedule is approved by the Council of the City of Pottsville, those charges shall be adhered to by the approved storage garage. No different schedule of charges shall be adopted without approval of the Council of the City of Pottsville, and no different charges shall be demanded of or collected from any person whose vehicle is removed or impounded under this article by any approved storage garage. The Council of the City of Pottsville shall delete from its list of approved storage garages any garage that makes any unapproved charge in connection with any vehicle removed or impounded under this article.