The Environmental Protection Agency (EPA) is taking final action to approve some elements and disapprove other elements of state implementation plan (SIP) submissions from Minnesota regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2008 ozone, 2010 nitrogen dioxide (NO<INF>2</INF>), 2010 sulfur dioxide (SO<INF>2</INF>), and 2012 fine particulate matter (PM<INF>2.5</INF>) 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 are adequate to meet the state's responsibilities under the CAA. EPA is disapproving certain elements of Minnesota's submissions relating to Prevention of Significant Deterioration (PSD) requirements. Minnesota already administers Federally promulgated regulations that address the disapprovals described in this rulemaking. Therefore, the state is not obligated to submit any new or additional regulations as a result of this disapproval. The proposed rulemaking associated with this final action was published on June 26, 2015, and EPA received one comment letter during the comment period, which ended on July 27, 2015.