; and (3) in subparagraph (B), as redesignated, by striking To each airport and inserting Subject to subparagraph (A), to each airport . (b) Period of availability Section 47117(b) is amended by striking 3 and inserting 4 . (c) United states share of project costs Section 47109 is amended by adding at the end the following: (g) Cost share (1) In general Subject to paragraph (2), the Government’s share of allowable project costs may be increased by the Administrator to 95 percent for a project at an airport that is categorized as a basic or unclassified airport in the most recently published National Plan of Integrated Airport Systems (NPIAS) report. (2) Multi-year projects If an airport sponsor has an approved multi-year project, approved by the Administrator, and the airport is recategorized above basic category, the cost share for that project shall remain at the cost share specified in paragraph (1) for the duration of the project. . (d) Use of apportioned amounts Section 47117(e)(1) is amended by adding at the end the following: (D) All amounts subject to apportionment for a fiscal year that are not apportioned under section 47114(d), for grants to sponsors of general aviation airports, reliever airports, or nonprimary commercial service airports. . 1303. Extending aviation development streamlining (a) In general Section 47171 is amended— (1) in subsection (a), in the matter preceding paragraph (1), by inserting general aviation airport construction or improvement projects, after congested airports, ; (2) in subsection (b)— (A) by redesignating paragraph (2) as paragraph (3); and (B) by inserting after paragraph (1) the following: (2) General aviation airport construction or improvement project A general aviation airport construction or improvement project shall be subject to the coordinated and expedited environmental review process requirements set forth in this section. ; (3) in subsection (c)(1), by striking (b)(2) and inserting (b)(3) ; (4) in subsection (d), by striking (b)(2) and inserting (b)(3)