Nothing in this Act shall confer power on any person to do anything, except with the consent of the person who so uses them, which interferes—
Where the appropriate agency proposes, otherwise than in exercise of any compulsory powers—
the appropriate agency shall consult the internal drainage board for that district before doing so.
A consent for the purposes of subsection (1) above may be given subject to reasonable conditions but shall not be unreasonably withheld.
Any dispute—
shall be referred to the arbitration of a single arbitrator to be appointed by agreement between the parties or, in default of agreement, by the President of the Institution of Civil Engineers.
The provisions of this section shall be without prejudice to the provisions of Schedule 22 to this Act.