SHARE OF AIRPORT PROJECT COSTS.

SEC. 162. SHARE OF AIRPORT PROJECT COSTS.(a) In General.—Section 47109 is amended—(1) by redesignating subsection (c) as subsection (d); and (2) by inserting after subsection (b) the following:“(c) Grandfather Rule.—“(1) In general.—In the case of any project approved after September 30, 2003, at a small hub airport or nonhub airport that is located in a 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 costs of the project shall be increased by the same ratio as the basic share of allowable costs of a project divided into the increased (Public Lands States) share of allowable costs of a project as shown on documents of the Federal Aviation Administration dated August 3, 1979, at airports for which the general share was 80 percent on August 3, 1979. This subsection shall apply only if—“(A) the State contained unappropriated and unreserved public lands and nontaxable Indian lands of more than 5 percent of the total area of all lands in the State on August 3, 1979; and “(B) the application under subsection (b), does not increase the Government’s share of allowable costs of the project.“(2) Limitation.—The Government’s share of allowable project costs determined under this subsection shall not exceed the lesser of 93.75 percent or the highest percentage Government share applicable to any project in any State under subsection (b).”.(b) Conforming Amendment.—Subsection (a) of section 47109 is amended by striking “Except as provided in subsection (b)” and inserting “Except as provided in subsection (b) or subsection (c)”.