339Saving for works etc. of drainage authorities etc.
(1)Subject to the provisions of this section, nothing in any of the provisions of this Act to which this section applies authorises a highway authority or any other person to use or interfere with any watercourse (including the banks thereof), or any drainage or other works, vested in or under the control of a water authority or other drainage body within the meaning of the [1976 c. 70.] Land Drainage Act 1976 without the consent of that authority or body.
(2)A consent required for the purposes of subsection (1) above shall not be unreasonably withheld, and if any question arises whether the withholding of a consent is unreasonable either party may require it to be referred to an arbitrator to be appointed, in default of agreement, by the President of the Institution of Civil Engineers.
(3)This section applies to sections 45, 100, 101, 110, 294 and 299 above and to the provisions specified in Schedule 22 to this Act.
(4)In its application to sections 100, 110, and 299 above this section applies in relation to a navigation authority as it applies in relation to a water authority or other drainage body within the meaning of the Land Drainage Act 1976.