Rent of talookdar &c. not changed for twenty years to be prima facie evidence of occupancy at that rent since permanent settlement.

    Whenever, in any suit under this Act, it shall be proved that the rent at which a talook or other tenure is held in the said Province has not been charged for a period of twenty years before the commencement of the suit, it shall be presumed that such talook or tenure has been held at that rent from the time of the permanent settlement, unless the contrary be shown, or it be proved that such rent was fixed at some later period.