Home › CFR › Title 43 › Part 4643 CFR Part 46 — Implementation of the National Environmental Policy Act of 1969Subpart B — Protection and Enhancement of Environmental Quality§ 46.105— Using a bureau-directed contractor to prepare environmental documents.§ 46.107— Procedures for applicant-prepared environmental impact statements and environmental assessments.§ 46.150— Emergency responses.Subpart C — Initiating the NEPA Process§ 46.205— Actions categorically excluded from further NEPA review.§ 46.210— Listing of departmental categorical exclusions.§ 46.215— Categorical exclusions: Extraordinary circumstances.§ 46.220— How to designate lead agencies.§ 46.225— How to select cooperating agencies.