Section 3(a) in The Tamil Nadu Backward Classes, Scheduled Castes and Scheduled Tribes (Reservation of Seats in Educational Institutions and of Appointments or Posts in the Services under the State) Act, 1993
(a)"Backward Classes of citizens" means the class or classes of citizens who are socially and educationally backward, as may be notified by the Government in the Tamil Nadu Government Gazette, and includes the Most Backward Classes and the Denotified Communities;
