; (B) $10,233,107,832 for fiscal year 2019; (C) $10,341,034,956 for fiscal year 2020; and (D) $10,453,299,174 for fiscal year 2021. . (b) Authorized expenditures Section 106(k)(2) is amended by striking for fiscal years 2012 through 2015 each place it appears and inserting for fiscal years 2018 through 2021 . (c) Authority To transfer funds Section 106(k)(3) is amended by striking 2012 through 2017 and inserting 2018 through 2021 . 1004. FAA research and development Section 48102 is amended— (1) in subsection (a)— (A) in the matter preceding paragraph (1)— (i) by striking 44511–44513 and inserting 44512–44513 ; and (ii) by striking and, for each of fiscal years 2012 through 2015, under subsection (g) ; and (B) by striking paragraphs (1) through (9) and inserting the following: (1) $175,000,000 for fiscal year 2018. (2) $175,000,000 for fiscal year 2019. (3) $175,000,000 for fiscal year 2020. (4) $175,000,000 for fiscal year 2021. ; and (2) in subsection (b), by striking paragraph (3). 1005. Funding for aviation programs (a) Airport and airway trust fund guarantee Section 48114(a)(1)(A) is amended to read as follows: (A) In general The total budget resources made available from the Airport and Airway Trust Fund each fiscal year under sections 48101, 48102, 48103, and 106(k)— (i) shall, in each of fiscal years 2018 through 2021, be equal to— (I) the sum of— (aa) 90 percent of the estimated level of receipts plus interest credited to the Airport and Airway Trust Fund for that fiscal year; and (bb) the actual level of receipts plus interest credited to the Airport and Airway Trust Fund for the second preceding fiscal year minus the total amount made available for obligation from the Airport and Airway Trust Fund for the second preceding fiscal year; and (II) less the amount calculated under subclause (I)(bb) for the fourth preceding year