1 CFR 601.17
§ 601.17 Supplemental Environmental Assessments.
United States · 1 CFR — General Provisions · Status: effective
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- Citation
- 1 CFR 601.17, § 601.17 Supplemental Environmental Assessments, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/379
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Full text
(a) The NCPC shall prepare a supplemental EA if five or more years have elapsed since adoption of the EA 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 EA at any time to further the purposes of NEPA.
(c) The NCPC shall prepare, circulate, and file a supplement to a Draft or Final EA, and adopt a FONSI in accordance with the requirements of §§ 601.15 and 601.16. If NCPC is not the Lead Agency, it shall proceed as outlined in § 601.16(b) and (c).
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.