1. Short title This Act may be cited as the Airport and Airway Extension Act of 2018, Part II . 2. Extension of airport improvement program (a) Section 48103 of title 49, United States Code, shall be applied by substituting $3,350,000,000 for each of fiscal years 2012 through 2018 and $64,246,575 for the period beginning on October 1, 2018, and ending on October 7, 2018. for $3,350,000,000 for each of fiscal years 2012 through 2018. . (b) Subject to limitations specified in advance in appropriations Acts, sums made available pursuant to subsection (a) may be obligated at any time through September 30, 2019, and shall remain available until expended. (c) Section 47104(c) of title 49, United States Code, shall be applied by substituting October 7, 2018 for September 30, 2018 . (d) Notwithstanding section 47114(b) of title 49, United States Code, the Secretary of Transportation shall apportion the amount subject to apportionment (as that term is defined in section 47114(a) of title 49, United States Code) for fiscal year 2019 on October 8, 2018. 3. Extension of expiring authorities (a) The following provisions of law shall be applied by substituting October 7, 2018 for September 30, 2018 : (1) Section 47141(f) of title 49, United States Code. (2) Section 409(d) of the Vision 100–Century of Aviation Reauthorization Act ( 49 U.S.C. 41731 note). (3) Section 411(h) of the FAA Modernization and Reform Act of 2012 ( 49 U.S.C. 42301 prec. note). (4) Section 822(k) of the FAA Modernization and Reform Act of 2012 ( 49 U.S.C. 47141 note). (b) The following provisions of law shall be applied by substituting October 8, 2018 for October 1, 2018 : (1) Section 47107(r)(3) of title 49, United States Code. (2) Section 2306(b) of the FAA Extension, Safety, and Security Act of 2016 (130 Stat. 641). (c) Section 186(d) of the Vision 100–Century of Aviation Reauthorization Act (117 Stat. 2518) shall be applied by substituting 2012 through 2018 and for the period beginning on October 1, 2018, and ending on October 7, 2018 for 2012