The Coun­ty shall keep a ver­ba­tim record of all closed or exec­u­tive ses­sion meet­ings of the cor­po­rate author­i­ties of the Coun­ty or any sub­sidiary “pub­lic body” as defined by the Illi­nois Open Meet­ings Act, 5 ILCS 120/1.  The ver­ba­tim record shall be in the form of an audio or video record­ing as deter­mined by the cor­po­rate author­i­ties.  (See 5 ILCS 120/2)