Adjusted premium charge on payment of mortgage
In the event that the principal obligation of any mortgage accepted for insurance under this section is paid in full prior to the maturity date, the Secretary is authorized in his discretion to require the payment by the mortgagee of an adjusted premium charge in such amount as the Secretary determines to be equitable, but not in excess of the aggregate amount of the premium charges that the mortgagee would otherwise have been required to pay if the mortgage had continued to be insured until such maturity date.