s 14 Prohibition notices.
(1) If the enforcing authority is of the opinion, as respects the carrying on of a prescribed process under an authorisation, that the continuing to carry it on, or the continuing to carry it on in a particular manner, involves an imminent risk of serious pollution of the environment the authority shall serve a notice (a “prohibition notice”) on the person carrying on the process. (2) A prohibition notice may be served whether or not the manner of carrying on the process in question contravenes a condition of the authorisation and may relate to any aspects of the process, whether regulated by the conditions of the authorisation or not. (3) A prohibition notice shall— (a) state the authority’s opinion; (b) specify the risk involved in the process; (c) specify the steps that must be taken to remove it and the period within which they must be taken; and (d) direct that the authorisation shall, until the notice is withdrawn, wholly or to the extent specified in the notice cease to have effect to authorise the carrying on of the process; and where the direction applies to part only of the process it may impose conditions to be observed in carrying on the part which is authorised to be carried on. (4) The Secretary of State may, if he thinks fit in relation to the carrying on by any person of a prescribed process, give to the enforcing authority directions as to— (a) whether the authority should perform its duties under this section; and (b) the matters to be specified in any prohibition notice in pursuance of subsection (3) above which the authority is directed to issue. (5) The enforcing authority shall, as respects any prohibition notice it has issued to any person, by notice in writing served on that person, withdraw the notice when it is satisfied that the steps required by the notice have been taken.