45 CFR Part 640

5 sections.

§ 640.1
Purpose
§ 640.2
Committee on Environmental Matters
§ 640.3
Actions requiring an environmental assessment and categorical exclusions
§ 640.4
Responsibilities and procedures for preparation of an environmental assessment
§ 640.5
Responsibilities and procedures for preparation of an environmental impact statement

This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.