This Act may be cited as the Green Federal Fleet Act.

(a) Prohibition Notwithstanding any other provision of law, except as provided in paragraph (2), the head of a Federal agency may not purchase or lease a non-tactical passenger vehicle from a non-Federal entity unless that vehicle is a zero-emission vehicle. (b) Exemption The head of a Federal agency may purchase or lease a non-tactical passenger vehicle from a non-Federal entity that is not a zero-emission vehicle if the head determines that, with respect to a particular circumstance, using a zero-emission vehicle will not be technically feasible. (c) Application The prohibition established under subsection (a) shall not apply with respect to purchases made and leases entered into before the date of the enactment of this Act. (d) Definitions In this Act: (1) Zero-emission vehicle The term zero-emission vehicle means a passenger vehicle that produces zero exhaust emissions of any criteria pollutant, precursor pollutant, or greenhouse gas, other than water vapor, in any mode of operation or condition, as determined by the Administrator of the Environmental Protection Agency. (2) Federal agency The term Federal Agency means an establishment in the legislative, judicial, or executive branch of the Federal Government.