; or (B) in the case of a small project, the project meeting an alternative standard that the Assistant Secretary shall establish under section 6 for purposes of this paragraph. (b) Terms and Limitations (1) In general A line of credit under this section with respect to a project shall be on such terms and conditions and contain such covenants, representations, warranties, and requirements (including requirements for audits) as the Assistant Secretary determines to be appropriate. (2) Maximum amounts The total amount of a line of credit under this section shall not exceed 33 percent of the reasonably anticipated eligible project costs. (3) Draws Any draw on a line of credit under this section shall— (A) represent a direct loan; and (B) be made only if net revenues from the project (including capitalized interest, but not including reasonably required financing reserves) are insufficient to pay the costs specified in subsection (a)(2). (4) Interest rate The interest rate on a direct loan resulting from a draw on the line of credit shall be not less than the yield on 30-year United States Treasury securities, as of the date of execution of the line of credit agreement. (5) Security A line of credit issued under this section— (A) shall— (i) be payable, in whole or in part, from— (I) amounts charged to— (aa) subscribers of broadband service for such service; or (bb) subscribers of any related service provided over the same infrastructure for such related service; (II) user fees; (III) payments owing to the obligor under a public-private partnership; or (IV) other dedicated revenue sources that also secure the senior project obligations; and (ii) include a coverage requirement or similar security feature supporting the project obligations