Revolving fund for redemption of real property

There is established a revolving fund, under the control of the Secretary, which shall be available without fiscal year limitation for all expenses necessary for the redemption (by the Secretary) of real property as provided in section 7425(d) and section 2410 of title 28 of the United States Code. There are authorized to be appropriated from time to time such sums (not to exceed $10,000,000 in the aggregate) as may be necessary to carry out the purposes of this section. The fund shall be reimbursed from the proceeds of a subsequent sale of real property redeemed by the United States in an amount equal to the amount expended out of such fund for such redemption. The Secretary shall maintain an adequate system of accounts for such fund and prepare annual reports on the basis of such accounts.