This confusion may complicate air permitting in and around Indian Country, so the resolution of this case should be of particular interest to entities seeking air permits to operate on or near Indian reservations.Notes:[1]See 78 Fed. Reg. 76829 (Dec. 19, 2013).[2] 42 U.S.C. § 7601(d)(2)(B).[3] 15 Stat. 673 (1868).[4] 17 Stat. 214 (1872).