The EPA is convening a proceeding for reconsideration of a final rule published in the Federal Register on December 21, 2007 (72 FR 62607). The subject rule was promulgated in response to a remand by the U.S. Court of Appeals for the District of Columbia Circuit in New York v. EPA, 413 F.3d 3 (D.C. Cir. 2005), in order to clarify the "reasonable possibility" recordkeeping and reporting standard under the New Source Review (NSR) program. After review of issues raised by the State of New Jersey by petition and letter, we have decided to exercise our discretion to conduct a reconsideration of this final rule and will therefore be reopening the public comment period for the rule. The rule will remain in effect while our reconsideration proceeding is under way.