On December 19, 2006, EPA published, as a proposed rule, a notice of reconsideration for several aspects of the November 29, 2005, Phase 2 of the final rule to implement the 8-hour ozone national ambient air quality standard (NAAQS). These issues relate to nitrogen oxide (NO<INF>X</INF>) reasonably available control technology (RACT) for electric generating units (EGUs) in Clean Air Interstate Rule (CAIR) states and to certain new source review (NSR) provisions. The notice of reconsideration was published as a result of a petition for reconsideration which had been submitted by the Natural Resources Defense Council. In this action, EPA summarizes and responds to comments received in response to the notice of reconsideration, and EPA announces its final actions taken in response to these comments. As a result of this reconsideration process, EPA is changing the deadline for states in the CAIR region to submit EGU NO<INF>X</INF> RACT SIPs subpart 2 ozone nonattainment areas classified as moderate and above. EPA is also modifying its guidance on the issue of NO<INF>X</INF> RACT for EGUs in CAIR states.