The Environmental Protection Agency (EPA) is approving three State Implementation Plan (SIP) revisions submitted by the State of Vermont. These revisions primarily amend several aspects of Vermont's new source review permitting regulations. The permitting revisions are part of Vermont's major and minor stationary source preconstruction permitting programs, and are intended to align Vermont's regulations with the federal new source review regulations. The revisions also contain amendments to other Clean Air Act (CAA) requirements, including updating the State's ambient air quality standards and certain emissions limits for sources of nitrogen oxides and sulfur dioxide. This action is being taken in accordance with the Clean Air Act.