Part 51 — Requirements for Preparation, Adoption, and Submittal of Implementation Plans
- Subpt. A Air Emissions Reporting Requirements §§51.1 to 51.50
- Subpt. B-E Subparts B-E [Reserved]
- Subpt. F Procedural Requirements §§51.100 to 51.105
- Subpt. G Control Strategy §§51.110 to 51.126
- Subpt. H Prevention of Air Pollution Emergency Episodes §§51.150 to 51.153
- Subpt. I Review of New Sources and Modifications §§51.160 to 51.166
- Subpt. J Ambient Air Quality Surveillance §51.190
- Subpt. K Source Surveillance §§51.210 to 51.214
- Subpt. L Legal Authority §§51.230 to 51.232
- Subpt. M Intergovernmental Consultation §§51.240 to 51.242
- Subpt. N Compliance Schedules §§51.260 to 51.262
- Subpt. O Miscellaneous Plan Content Requirements §§51.280 to 51.286
- Subpt. P Protection of Visibility §§51.300 to 51.309
- Subpt. Q Reports §§51.320 to 51.328
- Subpt. R Extensions §51.341
- Subpt. S Inspection/Maintenance Program Requirements §§51.350 to 51.373
- Subpt. T Conformity to State or Federal Implementation Plans of Transportation Plans, Programs, and Projects Developed, Funded or Approved Under Title 23 U.S.C. or the Federal Transit Laws §51.390
- Subpt. U Economic Incentive Programs §§51.490 to 51.494
- Subpt. W Determining Conformity of General Federal Actions to State or Federal Implementation Plans §§51.850 to 51.852-51.860
- Subpt. X Provisions for Implementation of 8-hour Ozone National Ambient Air Quality Standard §§51.900 to 51.919
- Subpt. Y Mitigation Requirements §51.930
- Subpt. Z Provisions for Implementation of PM 2.5 National Ambient Air Quality Standards §§51.1000 to 51.1016
- Subpt. AA Provisions for Implementation of the 2008 Ozone National Ambient Air Quality Standards §§51.1100 to 51.1119
- Subpt. BB Data Requirements for Characterizing Air Quality for the Primary SO 2 NAAQS §§51.1200 to 51.1205
- Subpt. CC Provisions for Implementation of the 2015 Ozone National Ambient Air Quality Standards §§51.1300 to 51.1319
- Subpt. DD Requirements for Reclassified Ozone Nonattainment Areas §§51.1400 to 51.1403