Clean Air Act Approval and Promulgation of Air Quality Implementation Plans for the State of Montana; Revisions to the Administrative Rules of Montana

EPA is taking direct final action approving State Implementation Plan (SIP) revisions submitted by the Governor of Montana on April 30, 2001, May 21, 2001 and December 20, 2001. The April 30, 2001 and December 20, 2001 submittals revise the State's Administrative Rules of Montana (ARM) by updating Incorporation by Reference rules. The May 21, 2001 submittal repeals the State's Sulfur Oxide--Primary Copper rule. EPA is also announcing that on February 1, 2002, we updated the delegation of authority for the implementation and enforcement of the New Source Performance Standards (NSPS) to the State. Finally, the Governor's April 30, 2001 submittal contains other SIP revisions which have been or will be addressed separately. The intended effect of this action is to make these revisions federally enforceable. The EPA is taking this action under section 110 of the Clean Air Act (CAA).