40Provisions as to part of navigation rendered unnecessary
Upon the opening to traffic of the new navigation—
(a)all obligations of the Board to maintain the superseded length and any other obligations of the Board and any right of navigation or other right or permission which may exist in relation to or in connection with the superseded length or any other waterway within the limits of deviation shall be extinguished; and
(b)the Corporation may, after consultation with the Board, fill in with spoil and other materials the site of the superseded length and adjoining lands in so far as the same are situate within the limits of deviation or within the lines marked on the deposited plans “Limit of land to be acquired”.