The Trade Effluents (Prescribed Processes and Substances) Regulations 1989
These Regulations specify two categories of trade effluent in respect of which 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 (which impose controls over the discharge of trade effluents into public sewers) are to apply.