As soon as may be after the passing of this Act the Commissioners shall prepare a draft scheme of arterial drainage for reducing flooding on the River Barrow and its tributaries and for the carrying out of the works necessary therefor and of such other works subsidiary or incidental thereto as the Commissioners may think necessary or desirable. Contents of the Scheme are outlined in section 2. Upon presentation of the draft scheme to the Minister for Finance by the Commissioners, the Minister fo