Section 158.15 - Project eligibility at PFC levels of $1, $2, or $3(a) To be eligible, a project must-(1) Preserve or enhance safety, security, or capacity of the national air transportation system;(2) Reduce noise or mitigate noise impacts resulting from an airport; or(3) Furnish opportunities for enhanced competition between or among air carriers.(b) Eligible projects are any of the following projects-(1) Airport development eligible under subchapter I of chapter 471 of 49 U.S.C.;(2) Airport planning eligible under subchapter I of chapter 471 of 49 U.S.C.;(3) Terminal development as described in 49 U.S.C. 47110(d) ;(4) Airport noise compatibility planning as described in 49 U.S.C. 47505 ;(5) Noise compatibility measures eligible for Federal assistance under 49 U.S.C. 47504 , without regard to whether the measures are approved under 49 U.S.C. 47504 ;(6) Construction of gates and related areas at which passengers are enplaned or deplaned and other areas directly related to the movement of passengers and baggage in air commerce within the boundaries of the airport. These areas do not include restaurants, car rental and automobile parking facilities, or other concessions. Projects required to enable added air service by an air carrier with less than 50 percent of the annual passenger boardings at an airport have added eligibility. Such projects may include structural foundations and floor systems, exterior building walls and load-bearing interior columns or walls, windows, door and roof systems, building utilities (including heating, air conditioning, ventilation, plumbing, and electrical service), and aircraft fueling facilities next to the gate;(7) A project approved under the FAA's "Program to Permit Cost-Sharing of Air Traffic Modernization Projects" under 49 U.S.C. 44517 ; or(8) If the airport is in an air quality nonattainment area (as defined by section 171(2) of the Clean Air Act (42 U.S.C. 7501(2) ) or a maintenance area referred to in section 175A of such Act (42 U.S.C. 7505a ), and the project will result in the airport receiving appropriate emission credits as described in 49 U.S.C. 47139 , a project for: (i) Converting vehicles eligible under § 158.15(b)(1) and ground support equipment powered by a diesel or gasoline engine used at a commercial service airport to low-emission technology certified or verified by the Environmental Protection Agency to reduce emissions or to use cleaner burning conventional fuels; or(ii) Acquiring for use at a commercial service airport vehicles eligible under § 158.15(b)(1) and, subject to § 158.13(c) , ground support equipment that include low-emission technology or use cleaner burning fuels.(c) An eligible project must be adequately justified to qualify for PFC funding.Doc. No. 26385, 56 FR 24278, May 29, 1991; 56 FR 37127, Aug. 2, 1991; Amdt. 158-2, 65 FR 34541 , May 30, 2000; Amdt. 158-4, 72 FR 28848 , May 23, 2007