(1)In this Part of this Act, except where the context otherwise requires—
(a)“main sewer ” means a public sewer used for the general reception of sewage from other public sewers and not substantially used for the reception of sewage from private sewers and drains ;
(b)“sewerage area of the Greater London Council ” means an area defined by an order made by the Minister as being the area drained by the sewers for the time being vested in the Council by virtue of section 35 of this Act and by any other sewers the sewage from which is directly or indirectly discharged into the sewers or sewage disposal works so vested in the Council, exclusive of any area in the district of the West Kent Main Sewerage Board and any area outside Greater London the sewage from which is so discharged in pursuance only of an agreement under section 28 of the Public Health Act 1936 ;
(c)any expression which is also used in Part II of the Public Health Act 1936 shall have the same meaning as in the said Part II.
(2)An order under subsection (1)(b) of this section defining the sewerage area of the Greater London Council as constituted on 1st April 1965 shall be made so as to come into force on that date and subsequent orders redefining that area shall be made thereunder as occasion may require.
(3)The Greater London Council shall keep, together with the documents relating to the business of the Council, a map or other document showing the extent for the time being of their sewerage area, and that map or other document shall be open to inspection by members of the public.
(4)Any installation or equipment installed or used for the purpose of treating any overflow of sewage from a sewer caused by an excess of storm water shall be deemed for the purposes of this Part of this Act to form part of that sewer and not to be or form part of a sewage disposal works.
(5)Any dispute between two authorities having functions with respect to sewers as to whether a sewer primarily serving the sewerage area of the Greater London Council is or is not a main sewer or whether or not a sewer or sewage disposal works primarily serves a part of that area or a part of Greater London not forming part of that area (other than a dispute which falls to be determined under section 17 of the Public Health Act 1936) shall in default of agreement be determined by the Minister.