Section 2(1)(c) in The Orissa Municipal Corporation (Division of City into Wards, Reservation of Seats, and Conduct of Election) Rules, 2003
(c)"Backward Class of citizens" means the backward classes of citizens of other than the Scheduled Castes and Scheduled Tribes as may be specified by the State Government from time to time in the list under the Orissa State Commission for Backward Classes Act, 1993;