; or (ii) an intermodal surface transportation facility adjacent to the airport; (2) removable power source means a power source that is separately installed in, and removable from, a zero-emission vehicle and may include a battery, a fuel cell, an ultra-capacitor, or other power source used in a zero-emission vehicle; and (3) zero-emission vehicle means— (A) a zero-emission vehicle as defined in section 88.102–94 of title 40, Code of Federal Regulations; or (B) a vehicle that produces zero exhaust emissions of any criteria pollutant (or precursor pollutant) under any possible operational modes and conditions. . (2) Clerical amendment The analysis for chapter 471 of title 49, United States Code, is amended by striking the items relating to sections 47136 and 47136a and inserting the following: 47136. Zero-emission airport vehicles and infrastructure. . (b) Special apportionment categories (1) In general Section 47117(e)(1)(A) of title 49, United States Code, is amended by inserting for airport development described in section 47102(3)(P), after under section 47141, . (2) Conforming amendment Section 47102(3) of title 49, United States Code, is amended by adding at the end the following: (P) converting or retrofitting vehicles and ground support equipment into eligible zero-emission vehicles and equipment or acquiring, by purchase or lease, eligible zero-emission vehicles and equipment. . (c) Deployment of zero-Emission vehicle technology (1) Establishment The Secretary of Transportation (in this subsection referred to as the Secretary ) may establish a zero-emission airport technology program— (A) to facilitate the deployment of commercially viable zero-emission airport vehicles, technology, and related infrastructure