It shall be the duty of an internal drainage board, of each of the Ministers and of the appropriate supervisory body, in formulating or considering any proposals relating to any functions of such a board—
so to exercise any power conferred with respect to the proposals on the board, that Minister or, as the case may be, the appropriate supervisory body as to further the conservation and enhancement of natural beauty and the conservation of flora, fauna and geological or physiographical features of special interest;
Subject to subsection (1) above, it shall be the duty of an internal drainage board, of each of the Ministers and of the appropriate supervisory body, in formulating or considering any proposals relating to any functions of such a board—
Subsections (1) and (2) above shall apply so as to impose duties on an internal drainage board in relation to—
as they apply in relation to proposals relating to the functions of an internal drainage board but as if, for that purpose, the reference in subsection (1)(a) above to enactments relating to the functions of such a board were a reference to enactments relating to that to which the proposal relates.
Subject to obtaining the consent of any navigation authority, harbour authority or conservancy authority before doing anything which causes navigation which is subject to the control of that authority to be obstructed or otherwise interfered with, it shall be the duty of an internal drainage board to take such steps as are—
for securing, so long as that board have rights to the use of water or land associated with water, that those rights are exercised so as to ensure that the water or land is made available for recreational purposes and is so made available in the best manner.
It shall be the duty of every internal drainage board, in determining what steps to take in performance of any duty imposed by virtue of subsection (4) above, to take into account the needs of persons who are chronically sick or disabled.
Nothing in this section (or any other provision of this Act) shall require recreational facilities made available by an internal drainage board to be made available free of charge.
In this section—
"building" includes structure; and
"harbour authority" means a harbour authority within the meaning of the Prevention of Oil Pollution Act 1971.