The Secretary of Defense shall pay into the Fund at the beginning of each fiscal year such amount as may be necessary to pay the cost to the Fund for that fiscal year resulting from the repeal, as of
October 1, 1999, of
section 5532 of title 5, including any actuarial loss to the Fund resulting from increased benefits paid from the Fund that are not fully covered by the payments made to the Fund for that fiscal year under subsections (a) and (b).