StacksVerified U.S. regulatory reference

40 CFR §51.1317

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
For each area classified Severe or Extreme for a specific ozone NAAQS, the state shall submit a SIP revision within 10 years of the effective date of designation for that ozone NAAQS that meets the requirements of CAA section 185.