The Environmental Protection Agency (EPA) is taking final action to approve in part, and disapprove in part, portions of the April 23, 2013, and December 9, 2015, of the State Implementation Plan (SIP) submissions, submitted by the State of Alabama, through the Alabama Department of Environmental Management (ADEM), to demonstrate that the State meets certain infrastructure requirements of the Clean Air Act (CAA or Act) for the 2010 1-hour nitrogen dioxide (NO<INF>2</INF>) national ambient air quality standards (NAAQS). The CAA requires that each state adopt and submit a SIP for the implementation, maintenance and enforcement of each NAAQS promulgated by EPA, which is commonly referred to as an "infrastructure" SIP. ADEM certified that the Alabama SIP contains provisions that ensure the 2010 1-hour NO<INF>2</INF> NAAQS is implemented, enforced, and maintained in Alabama. With the exception of the provisions pertaining to prevention of significant deterioration (PSD) permitting, and visibility in other states, for which EPA is proposing no action through this notice, and the provisions respecting state boards, for which EPA is finalizing disapproval, EPA has determined portions of Alabama's infrastructure SIP submissions, provided to EPA on April 23, 2013, and updated on December 9, 2015, satisfy certain required infrastructure elements for the 2010 1-hour NO<INF>2</INF> NAAQS.