allocated to the Mass Transit Account. (b) Terms and conditions (1) Term Bonds issued under subsection (a) shall have terms of 30 years. (2) Frequency Bonds shall be issued under subsection (a) every fiscal year. (3) Face amount formula for fiscal years 2017 through 2020 Bonds issued under subsection (a) for each of fiscal years 2017 through 2020 shall have a face amount that equals, for that fiscal year— (A) the Federal share (as defined in section 503(b)(8)(C)(v) of title 23, United States Code, and section 308(e)(3)(E) of title 49, United States Code) of the most recent estimates required under section 503(b)(8)(C)(iv) of title 23, United States Code, and section 308(e)(3)(D) of title 49, United States Code