1 CFR § 601.17 — § 601.17 Supplemental Environmental Assessments.

§ 601.17 Supplemental Environmental Assessments. ( 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) . {"origins":[{"level":"part","identifier":"601","label_level":"Part 601","hierarchy":{"title":"1","chapter":"VI","part":"601"},"current":false,"authority":["\u003ca href=\"https://www.govinfo.gov/link/uscode/42/4371\" class=\"usc external\" target=\"_blank\" rel=\"noopener noreferrer\"\u003e42 U.S.C. 4371\u003c/a\u003e; \u003ca href=\"/current/title-40/section-1507.3\" class=\"cfr external\"\u003e40 CFR 1507.3\u003c/a\u003e\n"],"source":["\u003ca href=\"https://www.federalregister.gov/citation/82-FR-45424\" class=\"fr-reference\" data-reference=\"82 FR 45424\"\u003e82 FR 45424\u003c/a\u003e, Sept. 29, 2017; \u003ca href=\"https://www.federalregister.gov/citation/82-FR-48609\" class=\"fr-reference\" data-reference=\"82 FR 48609\"\u003e82 FR 48609\u003c/a\u003e, Oct. 19, 2017, unless otherwise noted.\n"],"link":"/current/title-1/part-601","title":"Part 601"}]}