Section 5(2)(b) in The Chennai Metropolitan Water Supply and Sewerage Act, 1978
(b)consult and collaborate with the [Chennai] [Substituted for the word 'Madras' by the City of Madras (Alteration of Name) Act, 1996 (Tamil Nadu Act 28 of 1996).] Metropolitan Development Authority in regard to planning and undertaking development activities connected with the water supply and sewerage systems for the [Chennai] [Substituted for the word 'Madras' by the City of Madras (Alteration of Name) Act, 1996 (Tamil Nadu Act 28 of 1996).] Metropolitan Area and extend full assistance to and co-operate with the local authority in relation to matters connected with water supply systems or water works or sewerage works or road works or similar works;