(ii)
An amount of $9,000 which a debtor may receive under Federal benefit programs cited under clause (i) within a 12-month period shall be exempt from offset under this subsection. In applying the $9,000 exemption, the disbursing official shall—
(I)
reduce the $9,000 exemption amount for the 12-month period by the amount of all Federal benefit payments made during such 12-month period which are not subject to offset under this subsection; and
(II)
apply a prorated amount of the exemption to each periodic benefit payment to be made to the debtor during the applicable 12-month period.
For purposes of the preceding sentence, the amount of a periodic benefit payment shall be the amount after any reduction or deduction required under the laws authorizing the program under which such payment is authorized to be made (including any reduction or deduction to recover any overpayment under such program).