Purpose: This regulation provides guidance for implementation of the procedural provisions of the National Environmental Policy Act (NEPA) for the Civil Works Program of the U.S. Army Corps of Engineers. It supplements Council on Environmental Quality (CEQ) regulations 40 CFR 1500-1508, November 29, 1978, in accordance with 40 CFR 1507.3, and is intended to be used only in conjunction with the CEQ regulations. Whenever the guidance in this regulation is unclear or not specific the reader is referred to the CEQ regulations. Appendix A provides guidance on processing NEPA documents except for those concerning regulatory actions. Appendix C (formally ER 200-2-1) has been added to provide guidance on preparing and processing a notice of intent to prepare an EIS for publication in the Federal Register for all types of Corps actions. 33 CFR Part 325, Appendix B provides procedural guidance for preparing and processing NEPA documents for regulatory actions.