Failure to comply— If an individual who receives a graduate fellowship award under this section fails to comply with the agreement signed pursuant to subparagraph (C), the sum of the amounts of any graduate fellowship award received by such recipient shall, upon a determination of such a failure, be treated as a Federal Direct Unsubsidized Stafford Loan under part D of title IV Higher Education Act of 1965 (
20 U.S.C. 1087a et seq.), and shall be subject to repayment, together with interest thereon accruing from the date of the fellowship award, in accordance with terms and conditions specified by the Secretary in regulations under this section.