And be it enacted, That in every Case in which, under any confirmed Instrument of Apportionment or any altered Apportionment under the Powers of the said Acts, the whole Amount of the Rent-charge or separate Portion of Rent-charge with which the Lands of any Owner shall be charged in respect either of all Tithes or of any Kind of Tithes payable to separate Tithe-owners shall be a Sum not exceeding Twenty Shillings, it shall be lawful for such Owner at his Option, and with the Consent of the Person or Persons for the Time being entitled to the Receipt thereof, or, in the Case of an Infant, Feme Covert, or Lunatic, with the Consent of the Guardian, Husband, or Committee of the Estate of the Person so under Disability, at any Time to redeem such Rent-charge or separate Portion of Rent-charge on Payment, according to the Provisions of this Act, of such a Sum of Money as shall be not less than Twenty-four Times the Amount of the Rent-charge or Portion of Rent-charge ; and after Payment of such Consideration Money according to the Provisions of this Act the Commissioners shall certify that such Rent-charge or Portion of Rent-charge has been redeemed, and the same, from and after the Payment of the half-yearly Portion of such Rent-charge or Portion of Rent-charge which shall next accrue due subsequently to the Time of the Payment of such Consideration Money, shall cease and be extinguished: Provided always, that no such Redemption as last aforesaid shall extinguish or affect any extraordinary Rent-charge which would, become payable in respect of such Land upon any Change of the Cultivation thereof.