The Environmental Protection Agency (EPA) is approving a State Implementation Plan (SIP) revision submitted by the State of Vermont that addresses the infrastructure requirements of the Clean Air Act (CAA or Act)--including the interstate transport provisions--for the 2015 ozone National Ambient Air Quality Standards (NAAQS). The infrastructure requirements are designed to ensure that the structural components of each state's air-quality management program, including provisions prohibiting emissions that will have certain adverse air- quality effects in other states, are adequate to meet the state's responsibilities under the CAA. EPA is also approving the State of Vermont Executive Order (E.O.) 19-17, Executive Code of Ethics, which Vermont submitted with its infrastructure submission for the 2015 ozone NAAQS to be added to the SIP. Because E.O. 19-17 supersedes and replaces E.O. 09-11, EPA is also removing E.O. 09-11 from the Vermont SIP. This action is being taken in accordance with the Clean Air Act.