Section 40(2)(iv) in The Bihar Panchayat Raj Act, 2006
(iv)Such total number of seats of Pramukh reserved for women belonging to the Scheduled Castes, the Scheduled Tribes, the Backward Classes and unreserved category may be allotted by rotation by the District Magistrate under the direction, control and supervision of the State Election Commission to different Panchayat Samitis in a district in such manner as may be prescribed [After two consecutive general elections] [Inserted vide Section 7 of Amdt. Act 10 of 2009.] by it.