EPA is approving New Mexico State Implementation Plan (SIP) revisions submitted on July 5, 2011, and December 1, 2003, by the Governor of New Mexico addressing the regional haze requirements for the 16 Class I areas covered by the Grand Canyon Visibility Transport Commission Report and a separate submittal for other Federal mandatory Class I areas. We are taking final approval action on all components of the State's submittals except for the submitted nitrogen oxides (NO<INF>X</INF>) Best Available Retrofit Technology (BART) determination for the San Juan Generating Station (SJGS). We are also approving several SIP submissions offered as companion rules to the regional haze plan, including submitted regulations for the Western Backstop Sulfur Dioxide Trading Program, for the inventorying of emissions, for smoke management, and open burning. These SIP revisions were submitted to address the requirements of the Clean Air Act (CAA or Act) which require states to prevent any future and remedy any existing man-made impairment of visibility in mandatory Class I areas caused by emissions of air pollutants from numerous sources located over a wide geographic area (also referred to as the "regional haze program"). States are required to assure reasonable progress toward the national goal of achieving natural visibility conditions in Class I areas. EPA is taking this action pursuant to section 110 of the CAA.