; and (B) not more than $50,000,000 for fiscal year 2018. (b) Interest The amounts made available to IFA pursuant to subsection (a) shall be placed in interest-bearing accounts. (c) Rural infrastructure projects Of the amounts made available to IFA under this section, not less than 5 percent shall be used to offset subsidy costs associated with rural infrastructure projects. 304. Contract authority Notwithstanding any other provision of law, approval by the Board of Directors of a Federal credit instrument that uses funds made available under this Act shall impose upon the United States a contractual obligation to fund the Federal credit investment. 305. Limitation on authority IFA shall not have the authority to issue debt in its own name. IV Tax exemption requirements for State and local bonds 401. National limitation on amount of tax-exempt financing for facilities Section 142(m)(2)(A) of the Internal Revenue Code of 1986 is amended by striking $15,000,000,000 and inserting $16,000,000,000 . V Budgetary effects 501. Budgetary effects The budgetary effects of this Act, for the purpose of complying with the Statutory Pay-As-You-Go Act of 2010, shall be determined by reference to the latest statement titled Budgetary Effects of PAYGO Legislation for this Act, submitted for printing in the Congressional Record by the Chairman of the Senate Budget Committee, provided that such statement has been submitted prior to the vote on passage.