StacksVerified U.S. regulatory reference

40 CFR §51.1313

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (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.
  2. (b)The petition must contain adequate documentation that the criteria in CAA section 182(f) are met.
  3. (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.