In this subchapter:
(1) "Early action compact" means an agreement entered into before January 1, 2003, by the United States Environmental Protection Agency, the commission, the governing body of a county that is in attainment of the one-hour national ambient air quality standard for ozone but that has incidents approaching, or monitors incidents that exceed, the eight-hour national ambient air quality standard for ozone, and the governing body of the most populous municipality in that county that results in the submission of:
(A) an early action plan to the commission that the commission finds to be adequate; and
(B) a state implementation plan revision to the United States Environmental Protection Agency on or before December 31, 2004, that provides for attainment of the eight-hour national ambient air quality standard for ozone on or before December 31, 2007.
(2) "Participating county" means a county that is a party to an early action compact.