74Control of exercise of trade effluent functions in certain cases
(1)The provisions of the Public Health (Drainage of Trade Premises) Act 1937, Part V of the Public Health Act 1961 and sections 43 to 45 of the Control of Pollution Act 1974 shall have effect in relation to trade effluent to which this section applies subject to the provisions of Schedule 9 to this Act.
(2)This section applies to any trade effluent if—
(a)prescribed substances are present in the effluent or are present in the effluent in prescribed concentrations; or
(b)the effluent derives from a prescribed process or from a process involving the use of prescribed substances or the use of such substances in quantities which exceed the prescribed amounts.