CFR›Title 40›Chapter I›Part 227›Subpart A ContainsSections 227.1–227.3CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart A—General Sections 227.1 § 227.1 Applicability. 227.2 § 227.2 Materials which satisfy the environmental impact criteria of subpart B. 227.3 § 227.3 Materials which do not satisfy the environmental impact criteria set forth in subpart B. Next B Subpart B—Environmental Impact