Sector 9-C, Chapter II - A of the Tamil Nadu Town and Country Planning (Amendment) Act 1973 (Tamil Nadu Act No.22 of 1974 (Act 35 of 1972) prescribes that the Chennai Metropolitan Development Authority shall carry out a survey of Chennai Metropolitan Area and prepare a Master Plan referred to in section 17 of the Act. Accordingly the Chennai Metropolitan Development Authority has carried out necessary surveys and studies and prepared the Master plan for Chennai Metropolitan Area in 1975 and Government have approved it in G.O. Ms. No. 2395, R.D. & L.A., dt. 4-12-76.