Section 6(3)(c) in The Orissa Zilla Parishad Act, 1991
(c)As nearly as may be, but not less than one-third (including the number of seats reserved for women belonging to the Scheduled Castes, [the Scheduled Tribes and the backward class of citizens)] [Substituted vide Orissa Act No. 13 of 2001 (O.G.E. No. 1650 dated 7.9.2001).] of the total number of seats to be filled up by direct election in every Parishad shall be reserved for women and such seats shall be allotted by rotation to different constituencies in the Parishad.