The Secretary of the Treasury shall borrow from, receive from, lend to, or pay to the financing accounts such amounts as may be appropriate. The Secretary of the Treasury may prescribe forms and denominations, maturities, and terms and conditions for the transactions described above, except that the rate of interest charged by the Secretary on lending to financing accounts (including amounts treated as lending to financing accounts by the Federal Financing Bank (hereinafter in this subsection referred to as the “Bank”) pursuant to section
655
(b) of this title) and the rate of interest paid to financing accounts on uninvested balances in financing accounts shall be the same as the rate determined pursuant to section
661a
(5)(E) of this title. For guaranteed loans financed by the Bank and treated as direct loans by a Federal agency pursuant to section
655
(b) of this title, any fee or interest surcharge (the amount by which the interest rate charged exceeds the rate determined pursuant to section
661a
(5)(E) of this title) that the Bank charges to a private borrower pursuant to section
2285
(c) of title
12 shall be considered a cash flow to the Government for the purposes of determining the cost of the direct loan pursuant to section
661a
(5) of this title. All such amounts shall be credited to the appropriate financing account. The Bank is authorized to require reimbursement from a Federal agency to cover the administrative expenses of the Bank that are attributable to the direct loans financed for that agency. All such payments by an agency shall be considered administrative expenses subject to section
661c
(g) of this title. This subsection shall apply to transactions related to direct loan obligations or loan guarantee commitments made on or after October 1, 1991. The authorities described above shall not be construed to supersede or override the authority of the head of a Federal agency to administer and operate a direct loan or loan guarantee program. All of the transactions provided in this subsection shall be subject to the provisions of subchapter
II of chapter
15 of title
31. Cash balances of the financing accounts in excess of current requirements shall be maintained in a form of uninvested funds and the Secretary of the Treasury shall pay interest on these funds.