Section 52.2593 - Visibility protection(a)Approval. Wisconsin submitted its regional haze plan to EPA on January 18, 2012, supplemented on June 7, 2012. The Wisconsin regional haze plan meets the requirements of Clean Air Act section 169B and the Regional Haze Rule in 40 CFR 51.308 .(b)Approval. Wisconsin submitted its five-year progress report on March 17, 2017. The Progress Report meets the requirements of Clean Air Act sections 169A and 169B and the Regional Haze Rule in 40 CFR 51.308 . 83 FR 27912 , June 15, 2018