USEPA is approving a revision to the Minnesota State Implementation Plan (SIP) to incorporate new permitting regulations. This revision consists of the State Rules in Chapter 7007, entitled ``Air Emission Permits,'' in conjunction with other rule changes relating to the repeal of prior air permitting rules. Although these rules have been submitted previously to satisfy the requirements of Title V of the Clean Air Act, the purpose of this submittal is (1) to support federally enforceable permit conditions for limiting sources' potential to emit, (2) to allow the use of permits as vehicles for future SIP revisions, and (3) to update the procedural rules governing the issuance of air permits in Minnesota. USEPA concludes that all three purposes are satisfied.