; or (B) if the secured loan does not receive an investment-grade rating, the amount of the senior project obligations of the project. (2) Payment A secured loan under this section— (A) shall be payable, in whole or in part, from State or local taxes, user fees, or other dedicated revenue sources that also secure the senior project obligations of the relevant project; (B) shall include a rate covenant, coverage requirement, or similar security feature supporting the project obligations; and (C) may have a lien on revenues described in subparagraph (A), subject to any lien securing project obligations. (3) Interest rate The interest rate on a secured loan under this section shall be— (A) not less than the yield on United States Treasury securities of a similar maturity to the maturity of the secured loan on the date of execution of the loan agreement