; and (2) in subparagraph (B), by striking fiscal year 2004 and inserting fiscal years beginning with fiscal year 2024 . 604. Updating United States Government’s share of project costs (a) In general Section 47109 of title 49, United States Code, is amended— (1) by striking subsection (b) and inserting the following: (b) Increased government share In any State containing unappropriated and unreserved public lands and nontaxable Indian lands (individual and tribal) of more than 5 percent of the total area of all lands in the State, the Government’s share of allowable project costs provided in subsection (a) shall be— (1) unchanged for a project at a large hub airport in the State; or (2) 95 percent for a project at any other airport in the State. ; (2) by striking subsection (c) and redesignating subsections (d) through (f) as (c) through (e), respectively; (3) in subsection (e), as so redesignated, by striking paragraph (1) and inserting the following: (1) is not a medium or large hub airport; and ; and (4) by inserting after subsection (e), as so redesignated, the following: (f) Special rule for fiscal years 2024 through 2026 Notwithstanding subsection (a), the Government’s share of allowable project costs for a grant made to a nonhub or nonprimary airport in each of fiscal years 2024 through 2026 is 95 percent. . (b) Effective date The amendments made by subsection (a) shall take effect on October 1, 2023. 605. Primary airport designation Section 47114(c)(1) of title 49, United States Code, as amended by section 602, is amended by adding at the end the following: (L) Public airports with military use Notwithstanding any other provision of law, a public airport shall be considered a nonhub primary airport in fiscal year 2024 for purposes of this chapter if such airport was— (i) designated as a primary airport in fiscal year 2017