CFR›Title 40›Chapter I›Part 124›Subpart C ContainsSections 124.41–124.42CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart C—Specific Procedures Applicable to PSD Permits Sections 124.41 § 124.41 Definitions applicable to PSD permits. 124.42 § 124.42 Additional procedures for PSD permits affecting Class I areas. Previous B Subpart B—Specific Procedures Applicable to RCRA Permits Next D Subpart D—Specific Procedures Applicable to NPDES Permits