(1) The Corporation shall take steps to execute a scheme after the scheme has been approved by the Minister and, within the time specified in the scheme or within such further time as may be allowed by the Minister.
(2) The Corporation may in like manner and for the purposes of this scheme lay out, pave, and complete all roads upon the land acquired by it, and all roads so laid out and completed shall in accordance with existing law be public roads.
(3) The Corporation may engage the services of any person to carry the whole or any part of the scheme into effect upon such terms as the Corporation may think expedient.
(4) When a scheme has been substantially completed by the Corporation in accordance with this Act, the Corporation shall immediately certify that fact to the Minister and specify the date upon which the buildings within the area of the scheme or any part thereof shall be ready for habitation.