(4)The offices of the Chairpersons in the Panchayats at the village or any other level shall be reserved for the Scheduled Castes the Scheduled Tribes and women in such manner as the Legislature of a State may, by law, provide:Provided that the number of offices of Chairpersons reserved for the Scheduled Castes and the Scheduled Tribes in the Panchayats at each level in any State shall bear, as nearly as may be, the same proportion to the total number of such offices in the Panchayats at each level as the population of the Scheduled Castes in the State or of the Scheduled Tribes in the State bears to the total population of the State:Provided further that not less than one-third of the total number of offices of Chairpersons in the Panchayats at each level shall be reserved for women:Provided also that the number of offices reserved under this clause shall be allotted by rotation to different Panchayats at each level.