; (II) the BIFIA program loan resulting from a draw on the line of credit is payable from pledged revenues not affected by project performance, such as a tax-backed revenue pledge or a system-backed pledge of project revenues; and (III) the BIFIA program share of eligible project costs is 33 percent or less. (ii) Limitation If the Assistant Secretary waives the nonsubordination requirement under this subparagraph— (I) the maximum credit subsidy to be paid by the Federal Government shall be not more than 10 percent of the principal amount of the secured loan; and (II) the obligor shall be responsible for paying the remainder of the subsidy cost. (9) Fees The Assistant Secretary may establish fees at a level sufficient to cover all or a portion of the costs to the Federal Government of providing a line of credit under this section. (10) Relationship to other credit instruments A project that receives a line of credit under this section also shall not receive a secured loan or loan guarantee under section 4 in an amount that, combined with the amount of the line of credit, exceeds 49 percent of eligible project costs. (c) Repayment (1) Terms and conditions The Assistant Secretary shall establish repayment terms and conditions for each direct loan under this section based on— (A) the projected cash flow from project revenues and other repayment sources; and (B) the useful life of the infrastructure for the provision of broadband service being financed. (2) Timing All repayments of principal or interest on a direct loan under this section shall be scheduled— (A) to commence not later than 5 years after the end of the period of availability specified in subsection (b)(6)