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42 U.S.C. 7401, et seq.
63 FR 7271, Feb. 12, 1998, unless otherwise noted.
65 FR 51433, Aug. 23, 2000, unless otherwise noted.
70 FR 18117, Apr. 8, 2005, unless otherwise noted.
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Permits to construct are required for new major stationary sources and major modifications to existing major stationary sources pursuant to 40 CFR 52.21.