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(7) In order to determine the representation that the said boroughs and the Waitemata bounty should have on the Drainage Board, a special inquiry should be held by the Local Government Commission. (8) Appropriate amendments of the Drainage Act should be made to provide that — (a) The Metropolitan Drainage Board should be given-the sole right within the Northern Sewerage District to construct, maintain, and manage all main sewers and drains, pumping-stations, storage tanks, outfalls, and treatment-works . for sewage (compare section 32 (1) of the Act). (b) The said Board should be required as soon as conveniently practicable to provide for the sewage from the Northern Sewerage District to be conveyed to a suitable place and there treated and discharged (compare section 34 (4) of the Act). (c) Where any main sewer or drain, pumping-station, storage tank, septic tank, or outfall has been constructed within the Northern Seiverage District by any local authority, the same should be taken over by and vested in the said Board at such price and upon such terms and conditions as may be .agreed upon betiveen the said Board and such local authority or, in the event of their being unable to agree, as may be settled by arbitration under the Arbitration Act, 1908 (compare section 32 (2) of the Act). {d) The said Board should be empowered to construct, maintain, and operate within the Northern Seiverage District all such main servers, main drains, pumpingstations, storage tanks, outfalls, treatment-works, and other works and things as may, in the opinion of the Board, be advisable for the efficient drainage of the Northern Seiverage District (compare section 33 of the Act). (e) The said Board should be empowered to discharge the effluent from any treatment works constructed by the Board into the waters of the Waitemata Harbour or the Hauraki Gulf (compare section 34 (1) of the Act). ■(f) The construction of any outfall pipes should be subject to the precedent approval of the Marine Department and of the Auckland Harbour Board as to location, depth, and other details of construction (compare section 34 (2) of the Act). (g) The said Board should be required from time to time to obtain the approval of the Auckland Harbour Board as to the degree and character of purification of the effluent to be discharged from the said works to the waters of the Waitemata Harbour or Hauraki Gulf, and should be restrained from discharging or permitting to be discharged therefrom any effluent not conforming to the degree and character of purification for the time being approved by the Harbour Board (compare section 34 (3) of the Act). (h) The discharge of sewage from any portion of the Northern Sewerage District into the waters of the Waitemata Harbour or the Hauraki Gulf except through the main sewers of the said Board should be prohibited, but any existing drains should be allowed to continue to discharge sewage until the Board has completed provision for conveying such sewage to its treatment-works, and this provision should not apply to any discharge from storm-water overflow chambers forming part of the drainage system of any local authority (compare section 34 (4) of the Act). (9) Provision should also be made by appropriate amendments of the Drainage Act that—(a) A separate account shall be kept by the said Board of all property held by the Board and of all liabilities incurred, and also of all moneys received or disbursed by the Board in respect of the Northern Sewerage District, including the amounts paid by the Board to the local authorities in accordance with subparagraph (8) (c) above and all liabilities assumed by the Board thereunder.

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