{"data":{"id":"us/1-cfr-601.26","jurisdiction":"us","citation":"1 CFR 601.26","heading":"Supplemental Environmental Impact Statement.","body":"(a) The NCPC shall prepare a supplemental EIS if five or more years has elapsed since adoption of the EIS and:\n(1) There are substantial changes to the proposed action that are relevant to environmental concerns; or\n(2) There are significant new circumstances or information that are relevant to environmental concerns and have a bearing on the proposed action or its impacts.\n(b) The NCPC may supplement a Draft or Final EIS at any time, to further the purposes of NEPA.\n(c) The NCPC shall prepare, circulate, and file a supplement to a Draft or Final EIS in in accordance with the requirements of §§ 601.22 through 601.24 except that Public Scoping is optional for a supplemental EIS.\n(d) The NCPC shall prepare a ROD for a Supplemental EIS. The ROD's contents, the procedure for public review, and the manner in which it shall be adopted shall be as set forth in § 601.25.","path":["Title 1—General Provisions","CHAPTER VI—NATIONAL CAPITAL PLANNING COMMISSION","PART 601—IMPLEMENTATION OF THE NATIONAL ENVIRONMENTAL POLICY ACT","Subpart F—Environmental Impact Statements"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-1.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:23:37Z","sha256":"deabe9b7de719c5906381c23d553bfde288e05f01f278a98bfcfdd7233fcbb64","source_id":"us-cfr","stale":true,"prev":"us/1-cfr-601.25","next":"us/1-cfr-601.27"},"notice":"GroundRules: Original legal text. Not legal advice."}