; and (3) the likelihood that capital assistance provided for an investment would enable the investment to proceed sooner than the investment would otherwise be able to proceed. (f) Capital assistance The Secretary of Defense is authorized to provide capital assistance within this section. (1) Loans and loan guarantees (A) In general The Office may provide loans or loan guarantees to finance or refinance the costs of an eligible investment selected pursuant to subsection (e). (B) Administration of loans (i) Interest rate (I) In general Except as provided by subclause (II), the interest rate on a loan provided under subparagraph (A) shall be not less than the yield on marketable United States Treasury securities of a similar maturity to the maturity of the loan on the date of execution of the loan agreement. (II) Exception The Director may waive the requirement under subclause (I) with respect to an investment if the investment is determined by the Secretary of Defense to be vital to the national security of the United States. (III) Criteria The Director shall establish separate and distinct criteria for the interest rates for loan guarantees with private sector lending institutions. (ii) Final maturity date The final maturity date of a loan provided under subparagraph (A) shall be not later than 50 years after the date of substantial completion of the investment for which the loan was provided. (iii) Prepayment A loan provided under subparagraph (A) may be paid earlier than is provided for under the loan agreement without a penalty. (iv) Nonsubordination (I) In general A loan provided under subparagraph (A) shall not be subordinated to the claims of any holder of investment obligations in the event of bankruptcy, insolvency, or liquidation of the obligor. (II) Waiver The Director may waive the requirement under subclause (I) with respect to the investment in order to mitigate risks to loan repayment. (v) Sale of loans For which a loan is provided under subparagraph (A) and after notifying the obligor, the