Part 46 - Implementation of the National Environmental Policy Act of 1969  


Subpart A - General Information
§ 46.10 - Purpose of this part.
§ 46.20 - How to use this part.
§ 46.30 - Definitions.
Subpart B - Protection and Enhancement of Environmental Quality
§ 46.100 - Federal action subject to the procedural requirements of NEPA.
§ 46.105 - Using a contractor to prepare environmental documents.
§ 46.110 - Incorporating consensus-based management.
§ 46.115 - Consideration of past actions in the analysis of cumulative effects.
§ 46.120 - Using existing environmental analyses prepared pursuant to NEPA and the Council on Environmental Quality regulations.
§ 46.125 - Incomplete or unavailable information.
§ 46.130 - Mitigation measures in analyses.
§ 46.135 - Incorporation of referenced documents into NEPA analysis.
§ 46.140 - Using tiered documents.
§ 46.145 - Using adaptive management.
§ 46.150 - Emergency responses.
§ 46.155 - Consultation, coordination, and cooperation with other agencies.
§ 46.160 - Limitations on actions during the NEPA analysis process.
§ 46.170 - Environmental effects abroad of major Federal actions.
Subpart C - Initiating the NEPA Process
§ 46.200 - Applying NEPA early.
§ 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.
§ 46.230 - Role of cooperating agencies in the NEPA process.
§ 46.235 - NEPA scoping process.
§ 46.240 - Establishing time limits for the NEPA process.
Subpart D - Environmental Assessments
§ 46.300 - Purpose of an environmental assessment and when it must be prepared.
§ 46.305 - Public involvement in the environmental assessment process.
§ 46.310 - Contents of an environmental assessment.
§ 46.315 - How to format an environmental assessment.
§ 46.320 - Adopting environmental assessments prepared by another agency, entity, or person.
§ 46.325 - Conclusion of the environmental assessment process.
Subpart E - Environmental Impact Statements
§ 46.400 - Timing of environmental impact statement development.
§ 46.405 - Remaining within page limits.
§ 46.415 - Environmental impact statement content, alternatives, circulation and filing requirements.
§ 46.420 - Terms used in an environmental impact statement.
§ 46.425 - Identification of the preferred alternative in an environmental impact statement.
§ 46.430 - Environmental review and consultation requirements.
§ 46.435 - Inviting comments.
§ 46.440 - Eliminating duplication with State and local procedures.
§ 46.445 - Preparing a legislative environmental impact statement.
§ 46.450 - Identifying the environmentally preferable alternative(s).