(6)Effect of Table. - When a Table of Rates has been confirmed by the confirming authority, the order confirming it shall be conclusive evidence that the proceedings for the preparation of the Table have been duly conducted in accordance with this Act; and it may be presumed that the rates shown in the Table for tenants of each class, for each class of land, are the fair and equitable rates payable for land of that class within the area to which the Table applies.