The Environmental Protection Agency (EPA) is approving elements of State Implementation Plan (SIP) submissions from Vermont regarding the infrastructure requirements of the Clean Air Act (CAA or Act) for the 1997 fine particle matter (PM<INF>2.5</INF>), 1997 ozone, 2006 PM<INF>2.5</INF>, 2008 lead (Pb), 2008 ozone, 2010 nitrogen dioxide (NO<INF>2</INF>), and 2010 sulfur dioxide (SO<INF>2</INF>) National Ambient Air Quality Standards (NAAQS). We also are approving two statutes and one Executive Order submitted by Vermont in support of its demonstration that the infrastructure requirements of the CAA have been met. In addition, we are conditionally approving certain elements of Vermont's submittals relating to prevention of significant deterioration (PSD) requirements. Last, we are updating the priority classification for two of Vermont's air quality control regions for SO<INF>2</INF> based on recent air quality monitoring data collected by the state, which means that a contingency plan for SO<INF>2</INF> is not required. The infrastructure requirements are designed to ensure that the structural components of each state's air quality management program are adequate to meet the state's responsibilities under the CAA. This action is being taken in accordance with the CAA.