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Title 40

Displaying title 40, up to date as of 7/14/2026. Title 40 was last amended 7/14/2026.
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  1. Title 40 —Protection of Environment
  2. Chapter I —Environmental Protection Agency
  3. Subchapter C —Air Programs
  4. Part 51 —Requirements for Preparation, Adoption, and Submittal of Implementation Plans
  5. Subpart CC   View Full Text
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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter CAir Programs50 – 99
Part 51Requirements for Preparation, Adoption, and Submittal of Implementation Plans51.1 – 51.1403
Subpart CCProvisions for Implementation of the 2015 Ozone National Ambient Air Quality Standards51.1300 – 51.1319
§ 51.1300Definitions.
§ 51.1301Applicability of this part.
§ 51.1302Classification and nonattainment area planning provisions.
§ 51.1303Application of classification and attainment date provisions in CAA section 181 to areas subject to § 51.1302.
§§ 51.1304-51.1305 [Reserved]
§ 51.1306Redesignation to nonattainment following initial designations.
§ 51.1307Determining eligibility for 1-year attainment date extensions for an 8-hour ozone NAAQS under CAA section 181(a)(5).
§ 51.1308Modeling and attainment demonstration requirements.
§ 51.1309 [Reserved]
§ 51.1310Requirements for reasonable further progress (RFP).
§ 51.1311 [Reserved]
§ 51.1312Requirements for reasonably available control technology (RACT) and reasonably available control measures (RACM).
§ 51.1313Section 182(f) NOX exemption provisions.
§ 51.1314New source review requirements.
§ 51.1315Emissions inventory requirements.
§ 51.1316Requirements for an Ozone Transport Region.
§ 51.1317Fee programs for Severe and Extreme nonattainment areas that fail to attain.
§ 51.1318Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS.
§ 51.1319 [Reserved]
eCFR Content