; (ii) motor vehicles used for motor vehicle manufacturer product evaluations or tests; (iii) law enforcement vehicles; (iv) emergency vehicles; or (v) motor vehicles acquired and used for military purposes that the Secretary of Defense has certified to the Secretary must be exempt for national security reasons. (B) Fleet The term fleet means— (i) 20 or more light-duty vehicles, located in a metropolitan statistical area or consolidated metropolitan statistical area, as established by the Bureau of the Census, with a 1980 population of more than 250,000; or (ii) 10 or more medium- or heavy-duty vehicles, located at a Federal facility or located in a metropolitan statistical area or consolidated metropolitan statistical area, as established by the Bureau of the Census, with a 1980 population of more than 250,000. ; and (3) in subsection (f)(2)(B)— (A) by striking , either ; and (B) in clause (i), by striking or and inserting and . (b) Federal fleet conservation requirements Section 400FF(a) of the Energy Policy and Conservation Act ( 42 U.S.C. 6374e ) is amended— (1) in paragraph (1)— (A) by striking 18 months after the date of enactment of this section and inserting 12 months after the date of enactment of the Buy Low and Sell High Act ; (B) by striking 2010 and inserting 2023 ; and (C) by striking and increase alternative fuel consumption and inserting , increase alternative fuel consumption, and reduce vehicle greenhouse gas emissions ; and (2) by striking paragraph (2) and inserting the following: (2) Goals The goals of the requirements under paragraph (1) are that each Federal agency shall— (A) reduce fleet-wide per-mile greenhouse gas emissions from agency fleet vehicles, relative to a baseline of emissions in 2015, by— (i) not less than 30 percent by the end of fiscal year 2026; (ii) not less than 50 percent by the end of fiscal year 2030; and (iii) 100 percent by the end of fiscal year 2050