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36 FR 22398, Nov. 25, 1971, unless otherwise noted.
83 FR 10382, Mar. 9, 2018, unless otherwise noted.
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(a) A person or a state may petition the Administrator for an exemption from NOX obligations under CAA section 182(f) for any area designated nonattainment for a specific ozone NAAQS and for any area in a CAA section 184 ozone transport region.
(b) The petition must contain adequate documentation that the criteria in CAA section 182(f) are met.
(c) A CAA section 182(f) NOX exemption granted for a prior ozone NAAQS does not relieve the area from any NOX obligations under CAA section 182(f) for a current ozone NAAQS.
[83 FR 63033, Dec. 6, 2018]