CFR›Title 40›Chapter I›Part 74›Subpart A ContainsSections 74.1–74.4CorpusDaily eCFRDisplayed edition2026-05-12Last updated2026-05-12 Subpart A—Background and Summary Sections 74.1 § 74.1 Purpose and scope. 74.2 § 74.2 Applicability. 74.3 § 74.3 Relationship to the Acid Rain program requirements. 74.4 § 74.4 Designated representative. Next B Subpart B—Permitting Procedures