Removal and impounding of vehicles under this subchapter shall be done only by “approved storage garages” that shall be designated from time to time by the borough. Every such garage shall submit evidence to the borough that it is bonded or has acquired liability insurance in an amount satisfactory to the borough 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 borough its schedule of charges for towing and storage of vehicles under this subchapter and, when the schedule is approved by the borough, those charges shall be adhered to by the approved storage garage; no different schedule of charges shall be demanded of or collected from any person whose vehicle is removed or impounded under this subchapter by any approved storage garage. The borough 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 subchapter.