On May 12, 2005, EPA published in the Federal Register the final "Rule to Reduce Interstate Transport of Fine Particulate Matter and Ozone" (Clean Air Interstate Rule or CAIR). The CAIR requires certain upwind States to reduce emissions of nitrogen oxides (NO<INF>X</INF>) and/or sulfur dioxide (SO<INF>2</INF>) that significantly contribute to nonattainment of, or interfere with maintenance by, downwind States with respect to the fine particle and/ or 8-hour ozone national ambient air quality standards (NAAQS). Subsequently, EPA received 12 petitions for reconsideration of the final rule. On December 2, 2005, EPA published a notice of its decision to grant reconsideration of four issues raised in the petitions for reconsideration, and granted an additional opportunity for public comment. On December 29, 2005, EPA published a notice of its decision to grant reconsideration of an additional issue raised by a petition for reconsideration, and again granted an additional opportunity for public comment. In this notice, EPA is announcing its final decisions on the five specific issues addressed in the December 2005 notices.