• National Environmental Policy Act (NEPA) of 1969
   
• Final Rule: Bipartisan Permitting Reform Implementation Rule, May 1, 2024
   
• Final Rule: Update to the Regulations Implementing the Procedural Provisions of the National Environmental Policy Act, July 15, 2020
   
• Regulations for Implementing the Procedural Provisions of NEPA (40 CFR Parts 1500–1508) (July 2020)
   
• Council on Environmental Quality (CEQ) NEPA Guidance
   
• CEQ 40 Questions presents forty of the most frequently asked questions concerning NEPA regulations, (Pre-July, 2020)
   

https://www.phmsa.dot.gov/planning-and-analytics/environmental-analysis-and-compliance/national-historic-preservation-act