Notice requiring works etc.
9.—(1) Where the Authority is satisfied that there is a significant risk of pollution of controlled waters as a result of—
(a)the use of an exempt structure mentioned in regulation 6 above for storage of a relevant substance; or
(b)the making of silage in circumstances in which the exemption conferred by regulation 7 above applies,
it may serve notice on the person having custody or control of the relevant substance requiring him to carry out such works and to take such precautions and other steps as it considers appropriate, having regard to the requirements of Schedule 1, Schedule 2 or, as the case may be, Schedule 3, for reducing that risk to a minimum.
(2) The notice shall specify or describe the works, precautions or other steps which the person is required to carry out or take, state the period within which any such requirement is to be complied with and inform him of the effect in relation to the notice of regulation 10 below.
(3) The period for compliance stated in the notice shall be such period as is reasonable in the circumstances and shall not in any case be less than 28 days.
(4) The Authority may at any time—
(a)withdraw the notice;
(b)extend the period for compliance with any requirement of the notice;
(c)with the consent of the person on whom the notice is served, modify the requirements of the notice,
and shall do so if so directed by the Secretary of State under regulation 10(4) below.