(a) The Secretary shall permit a borrower of a loan made or insured under this chapter to make a prospective payment on such loan with proceeds from
(1) the leasing of oil, gas, or other mineral rights to real property used to secure such loan; or
(2) the sale of oil, gas, or other minerals removed from real property used to secure such loan, if the value of the rights to such oil, gas, or other minerals has not been used to secure such loan.