CHICAGO - A Seventh Circuit U.S. Court of Appeals panel on July 8 upheld that dismissal lawsuits brought by the federal government and State of Illinois against three energy companies accused of violating the Clean Air Act (CAA) by failing to obtain permits before upgrading their power plants after agreeing with a federal judge in Illinois that the suits were barred by the act's five-year statute of limitations (United States of America, et al. v. Midwest Generation LLC, et al., Nos. 12-1026, 12-1051, 7th Cir.; 2013 U.S. App. LEXIS 13709).