(1)Seats shall be reserved for--(a)the Scheduled Castes; and(b)the Scheduled Tribes,in every Panchayat and the number of seats so reserved shall bear, as nearly as may be, the same proportion to the, total number of seats to be filled by direct election in that Panchayat as the population of the Scheduled Castes in that Panchayat area or of the Scheduled Tribes in that Panchayat area bears to the total population of that area and such seats may be allotted by rotation to different constituencies in a Panchayat.