(1)In this Act, unless the context otherwise requires, the following expressions have the meanings hereby respectively assigned to them, that is to say :—
" district " means, in relation to a local authority, the area over which that authority have jurisdiction ;
" harbour " and " tidal water " have the meanings respectively assigned to those expressions by section seven hundred and forty-two of the [57 & 58 Vict. c. 60.] Merchant Shipping Act, 1894;
" interested body " means—
where the local authority's sewer into which the trade effluent is, or is to be, received discharges into any sewer or sewage disposal works of a joint sewerage authority or of another sewerage authority, that joint sewerage or other sewerage authority, or
where the local authority's said sewer has an outfall into any harbour or tidal water, or is connected directly or indirectly with any sewer or sewage disposal works having such an outfall, the harbour authority or conservancy authority having jurisdiction in respect of that harbour or tidal water;
and for the purposes of this definition " harbour authority " and " conservancy authority " have the meanings respectively assigned to those expressions by section seven hundred and forty-two of the Merchant Shipping Act, 1894;
" joint sewerage authority " means any board, council, committee or other body authorised under or by virtue of any enactment to maintain sewers or sewage disposal works for the use of two or more local authorities;
" trade effluent " means any liquid, either with or without particles of matter in suspension therein, which is wholly or in part produced in the course of any trade or industry carried on at trade premises, and, in relation to any trade premises, means any such liquid as aforesaid which is so produced in the course of any trade or industry carried on at those premises, but does not include domestic sewage;
" trade premises " means any premises used or intended to be used for carrying on any trade or industry.
(2)This Act shall be construed as one with the principal Act, and, without prejudice to the generality of the preceding provision, section ninety of the principal Act (which relates to the interpretation of expressions used in Part II of that Act) shall apply for the purposes of this Act as that section applies for the purposes of Part II of the principal Act.