If for any 12-month period beginning on or after January 1, 1981, the Secretary, after consultation with the Secretary of the Treasury, determines that the average of the bond equivalent rates of 91-day Treasury bills auctioned for such 12-month period is equal to or less than 9 percent, the interest rate for loans under this part shall be the rate prescribed in subsection (a)(3) for borrowers described in such subsection.
Except as otherwise provided in this subsection, the applicable rate of interest on loans made pursuant to section 1078–1 [1] or 1078–2 of this title on or after October 1, 1981, shall be 14 percent per year on the unpaid principal balance of the loan.
If for any 12-month period beginning on or after October 1, 1981, the Secretary, after consultation with the Secretary of the Treasury, determines that the average of the bond equivalent rates of 91-day Treasury bills auctioned for such 12-month period is equal to or less than 14 percent, the applicable rate of interest for loans made pursuant to section 1078–1 1 or 1078–2 of this title on and after the first day of the first month beginning after the date of publication of such determination shall be 12 percent per year on the unpaid principal balance of the loan.
If for any 12-month period beginning on or after the date of publication of a determination under paragraph (2), the Secretary, after consultation with the Secretary of the Treasury, determines that the average of the bond equivalent rates of 91-day Treasury bills auctioned for such 12-month period exceeds 14 percent, the applicable rate of interest for loans made pursuant to section 1078–1 1 or 1078–2 of this title on and after the first day of the first month beginning after the date of publication of that determination under this paragraph shall be 14 percent per year on the unpaid principal balance of the loan.
Any adjustment amount computed pursuant to paragraphs (2) and (4) of this subsection for any quarter shall be credited, by the holder of the loan on the last day of the calendar year in which such quarter falls, to the loan account of the borrower so as to reduce the principal balance of such account. No such credit shall be made to the loan account of a borrower who on the last day of the calendar year is delinquent for more than 30 days in making a required payment on the loan, but the excess interest shall be calculated and credited to the Secretary. Any credit which is to be made to a borrower’s account pursuant to this subsection shall be made effective commencing no later than 30 days following the last day of the calendar year in which the quarter falls for which the credit is being made. Nothing in this subsection shall be construed to require refunding any repayment of a loan. At the option of the lender, the amount of such adjustment may be distributed to the borrower either by reduction in the amount of the periodic payment on loan, by reducing the number of payments that shall be made with respect to the loan, or by reducing the amount of the final payment of the loan. Nothing in this paragraph shall be construed to require the lender to make additional disclosures pursuant to section 1083(b) of this title.
For the purpose of enabling holders of loans to make the determinations and adjustments provided for in this subsection, the Secretary shall for each calendar quarter commencing with the quarter beginning on July 1, 1987, publish a notice of the average of the bond equivalent rates of 91-day Treasury bills auctioned for such quarter. Such notice shall be published not later than 7 days after the end of the quarter to which the notice relates.
Notwithstanding subsection (h), with respect to any loan made, insured, or guaranteed under this part (other than a loan made pursuant to section 1078–2 or 1078–3 of this title) for which the first disbursement is made on or after July 1, 2006, and before July 1, 2010, the applicable rate of interest shall be 6.8 percent on the unpaid principal balance of the loan.
Notwithstanding subsection (h), with respect to any loan under section 1078–2 of this title for which the first disbursement is made on or after July 1, 2006, and before July 1, 2010, the applicable rate of interest shall be 8.5 percent on the unpaid principal balance of the loan.
Nothing in this section or section 1078–3 of this title shall be construed to prohibit a lender from charging a borrower interest at a rate less than the rate which is applicable under this part.