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42 U.S.C. 7401 et seq.
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Nomenclature changes to part 52 appear at 81 FR 74586, Oct. 26, 2016.
The Michigan program submitted on November 13, 1992, January 8, 1993, and November 12, 1993, as a requested revision to the Michigan State Implementation Plan satisfies the requirements of section 507 of the Clean Air Act Amendments of 1990.
[59 FR 28788, June 3, 1994]