§52.270. Significant deterioration of air quality.
40 C.F.R. § 52.270
Notes, amendments, and revision history
Amendments
[50 FR 25419, June 19, 1985, as amended at 50 FR 30943, July 31, 1985; 68 FR 11322, Mar. 10, 2003; 68 FR 74488, Dec. 24, 2003; 76 FR 48008, Aug. 8, 2011; 77 FR 65310, Oct. 26, 2012; 77 FR 73322, Dec. 10, 2012; 77 FR 73320, Dec. 10, 2012; 80 FR 69882, Nov. 12, 2015; 81 FR 50342, Aug. 1, 2016; 81 FR 69392, Oct. 6, 2016; 82 FR 13245, Mar. 10, 2017; 82 FR 14611, Mar. 22, 2017; 82 FR 30773, July 3, 2017; 83 FR 43766, Aug. 28, 2018; 86 FR 33541, June 25, 2021]
Authority
Authority: 42 U.S.C. 7401 et seq.
Amendments
[40 FR 5521, Feb. 6, 1975]
Amendments
[50 FR 25419, June 19, 1985, as amended at 50 FR 30943, July 31, 1985; 68 FR 11322, Mar. 10, 2003; 68 FR 74488, Dec. 24, 2003; 76 FR 48008, Aug. 8, 2011; 77 FR 65310, Oct. 26, 2012; 77 FR 73322, Dec. 10, 2012; 77 FR 73320, Dec. 10, 2012; 80 FR 69882, Nov. 12, 2015; 81 FR 50342, Aug. 1, 2016; 81 FR 69392, Oct. 6, 2016; 82 FR 13245, Mar. 10, 2017; 82 FR 14611, Mar. 22, 2017; 82 FR 30773, July 3, 2017; 83 FR 43766, Aug. 28, 2018; 86 FR 33541, June 25, 2021]