; and (B) cannot complete such financing consistent with the timely execution of the project plans without the guarantee, as determined by the Secretary. (2) Form, denominations, maturities, and conditions Notes or other obligations guaranteed under this section shall be in such form and denominations, have such maturities, and be subject to such conditions as may be prescribed by regulations issued by the Secretary. (3) Repayment period The Secretary may not deny a guarantee under this section on the basis of the proposed repayment period for the note or other obligation unless— (A) the period is more than 20 years; or (B) the Secretary determines that the period causes the guarantee to constitute an unacceptable financial risk. (4) Aggregate principal amount Notwithstanding any other provision of law and subject only to the absence of qualified applicants or proposed activities and to the authority provided in this section, to the extent approved or provided in appropriation Acts, the Secretary shall enter into commitments to guarantee notes and obligations under this section with an aggregate principal amount of not more than— (A) $2,000,000,000 for fiscal year 2023; and (B) for each subsequent fiscal year, an amount that is increased for inflation as determined by the Secretary. (c) Prerequisites The Secretary may not make a guarantee or commitment to guarantee with respect to any note or other obligation if— (1) the total outstanding notes or obligations of the issuer guaranteed under this section would thereby exceed an amount equal to 5 times the most recent allocation for the issuer under this title