Section 12(1)(b) in Tamil Nadu Town and Country Planning Act, 1971
(b)every local planning authority shall be-(i)to carry out a survey of the local planning area and prepare reports on the surveys so carried out;(ii)to prepare a present land use map and such other maps as may be necessary for the purpose of preparing a master plan or a detailed development plan;(iii)to prepare a master plan and a detailed development plan;(iv)to carry out or cause to be carried out such works as are contemplated in the master plan and detailed development plan;