Section 54(2)(a) in The Manipur Panchayati Raj Act, 1994
(a)such number of offices of the Adhyaksha and Up-Adhyaksha of Zilla Parishad in the State for persons belonging to the Scheduled Castes and Scheduled Tribes shall as nearly as may be, the same proportion to the total number of offices in the Zilla Parishad as the population of the Scheduled Castes or of the Scheduled Tribes in the State bear to the total population of the State;