; or (2) limit the authority of a State, local, or Tribal permitting authority to impose more stringent emissions requirements pursuant to State, local, or Tribal law than national ambient air quality standards. 5. Definitions In this Act: (1) Administrator The term Administrator means the Administrator of the Environmental Protection Agency. (2) Best available control technology The term best available control technology has the meaning given to that term in section 169(3) of the Clean Air Act ( 42 U.S.C. 7479(3) ). (3) Highly influential scientific assessment The term highly influential scientific assessment means a highly influential scientific assessment as defined in the publication of the Office of Management and Budget entitled Final Information Quality Bulletin for Peer Review (70 Fed. Reg. 2664 (January 14, 2005)). (4) Lowest achievable emission rate The term lowest achievable emission rate has the meaning given to that term in section 171(3) of the Clean Air Act ( 42 U.S.C. 7501(3) ). (5) National ambient air quality standard The term national ambient air quality standard means a national ambient air quality standard promulgated under section 109 of the Clean Air Act ( 42 U.S.C. 7409 ). (6) Preconstruction permit The term preconstruction permit — (A) means a permit that is required under title I of the Clean Air Act ( 42 U.S.C. 7401 et seq. ) for the construction or modification of a stationary source