StacksVerified U.S. regulatory reference

40 CFR §51.1302

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
An area designated nonattainment for the 2015 ozone NAAQS will be classified in accordance with CAA section 181, as interpreted in § 51.1303(a), and will be subject to the requirements of subpart 2 of part D of title I of the CAA that apply for that classification.