1. Short title This Act may be cited as the Federal Leadership in Energy Efficient Transportation Act or the FLEET Act . 2. Purposes The purposes of this Act are to provide for the upgrade of the vehicle fleet of the United States Postal Service, to improve mail delivery services to benefit customers and the environment, to increase savings by reducing maintenance or other costs, and to set benchmarks to maximize fuel economy and reduce emissions for the Postal fleet with the goal of making the Postal Service a national leader in efficiency and technology innovation. 3. Authority to enter into energy savings performance contracts Section 804(4) of the National Energy Conservation Policy Act ( 42 U.S.C. 8287c(4) ) is amended— (1) in subparagraph (A), by striking or after the semicolon; (2) in subparagraph (B), by striking the period at the end and inserting ; or ; and (3) by adding at the end the following new subparagraph: (C) in the case of a contract in which the United States Postal Service is a party— (i) the purchase or lease of low emission and fuel efficient vehicles; (ii) a measure to upgrade a vehicle owned, operated, leased, or otherwise controlled by or assigned to the United States Postal Service to increase average fuel economy and reduce the emissions of carbon dioxide of such vehicle