Section 3(2)(ii) in Tamil Nadu District Municipalities Building Rules, 1972
(ii)A plan or plans (in triplicate) of the building to be constructed, reconstructed or altered or added to, drawn or reproduced in a clear and intelligible manner on suitable and durable material and showing a ground plan, plans of elevations of each floor and sections of the buildings and complying with the requirements specified in Appendix-C; and