---
kind: "section"
citation: "1 C.F.R. § 601.26"
title: "1"
number: "601.26"
heading: "Supplemental Environmental Impact Statement."
url: "https://uscodex.org/cfr/1/601.26"
---

# §601.26. Supplemental Environmental Impact Statement.

- (a) The NCPC shall prepare a supplemental EIS if five or more years has elapsed since adoption of the EIS and:
  - (1) There are substantial changes to the proposed action that are relevant to environmental concerns; or
  - (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.
- (b) The NCPC may supplement a Draft or Final EIS at any time, to further the purposes of NEPA.
- (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](/cfr/1/601.22..601.24.md) except that Public Scoping is optional for a supplemental EIS.
- (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](/cfr/1/601.25.md).

## Notes

### Authority

Authority: 42 U.S.C. 4371; 40 CFR 1507.3

### Source

Source: 82 FR 45424, Sept. 29, 2017; 82 FR 48609, Oct. 19, 2017, unless otherwise noted.