MMA will work with the Air Quality Division of the DEQ to gain final EPA approval of all current Michigan air permitting regulations contained in the Michigan rules and awaiting formal EPA approval of the State Implementation Plan (SIP). Michigan manufacturers rely upon the Michigan rules but the absence of federal approval creates significant regulatory uncertainty. Some rules have not been officially approved by the EPA through this SIP approval process for many years. It should be noted that Michigan’s minor source SIP was last approved by the EPA on 1/27/82. Since that time, the DEQ has made several changes, some dating back to 11/12/93, with no final action by the EPA. Some of the Air Pollution Control Rules included in those SIP submittals have been in effect since 4/20/89.