37Revocation of consents and alteration and imposition of conditions
(1)It shall be the duty of a water authority by which a consent is given in pursuance of section 34 of this Act to review from time to time the consent and the conditions, if any, to which the consent is subject; and subject to the following section the authority may, by a notice served on the person making a discharge in pursuance of the consent, revoke the consent if it is reasonable to do so or make reasonable modifications of the said conditions or, in the case of an unconditional consent, provide that it shall be subject to reasonable conditions specified in the notice.
(2)Subject to the following section, the Secretary of State may, either in consequence of representations made to him or otherwise, direct a water authority to serve a notice in pursuance of the preceding subsection containing such provisions as are specified in the direction and it shall be the duty of the authority to comply with the direction; and if the authority fails to serve the notice within such period as the Secretary of State may allow he may, without prejudice to the generality of the powers conferred on him by section 97 of this Act or, in Scotland, section 211 of the [1973 c. 65.] Local Government (Scotland) Act 1973, serve the notice on behalf of the authority, and it is hereby declared that for the purposes of this Part of this Act a notice served on behalf of an authority by virtue of this subsection is served by the authority.