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36 FR 22398, Nov. 25, 1971, unless otherwise noted.
77 FR 30170, May 21, 2012, unless otherwise noted.
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For each area classified as Severe or Extreme for the 2008 ozone NAAQS, the state shall submit a SIP revision within 10 years of the effective date of designation that meets the requirements of CAA section 185.
[80 FR 12314, Mar. 6, 2015]