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republic-os/legal/us/code/title-42/chapter-55/section-4336.md
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Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-07-06 10:51:44 -04:00

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---
type: "LegalText"
title: "42 U.S.C. § 4336"
description: "Procedure for determination of level of review"
jurisdiction: "us"
corpus: "united_states_code"
kind: "code_section"
title_number: 42
title_name: "THE PUBLIC HEALTH AND WELFARE"
chapter_number: "55"
chapter_name: "NATIONAL ENVIRONMENTAL POLICY"
section: "4336"
citation: "42 U.S.C. § 4336"
status: "current"
release_point: "119-100"
release_date: "2026-06-26"
source: "official"
source_url: "https://uscode.house.gov/download/releasepoints/us/pl/119/100/xml_usc42@119-100.zip"
source_identifier: "/us/usc/t42/s4336"
source_file: "data/legal/raw/us/code/title-42/usc42.xml"
source_hash: "f73f0c9913660c8f03cec048106255e70dcdfda90ad8434f59fe1ad323832a3c"
raw_snapshot_hash: "644321055a08eb1f260a6a3e31ac157fa024756abf612a9fd6857e7e400cf24e"
text_hash: "6f7d1a4aabfac4d04db35247822bc216fe63a11ae572926a0f8c56c1fadd21ff"
retrieved_at: "2026-07-04"
confidence: "official"
tags: ["legal", "us-code"]
---
# 42 U.S.C. § 4336 - Procedure for determination of level of review
## Text
(a) Threshold determinations An agency is not required to prepare an environmental document with respect to a proposed agency action if—
(1) the proposed agency action is not a final agency action within the meaning of such term in chapter 5 of title 5;
(2) the proposed agency action is excluded pursuant to one of the agencys categorical exclusions, another agencys categorical exclusions consistent with section 4336c of this title, or another provision of law;
(3) the preparation of such document would clearly and fundamentally conflict with the requirements of another provision of law; or
(4) the proposed agency action is a nondiscretionary action with respect to which such agency does not have authority to take environmental factors into consideration in determining whether to take the proposed action.
(b) Levels of review (1) Environmental impact statement An agency shall issue an environmental impact statement with respect to a proposed agency action requiring an environmental document that has a reasonably foreseeable significant effect on the quality of the human environment.
(2) Environmental assessment An agency shall prepare an environmental assessment with respect to a proposed agency action that does not have a reasonably foreseeable significant effect on the quality of the human environment, or if the significance of such effect is unknown, unless the agency finds that the proposed agency action is excluded pursuant to one of the agencys categorical exclusions, another agencys categorical exclusions consistent with section 4336c of this title, or another provision of law. Such environmental assessment shall be a concise public document prepared by a Federal agency to set forth the basis of such agencys finding of no significant impact or determination that an environmental impact statement is necessary.
(3) Sources of information In making a determination under this subsection, an agency—
(A) may make use of any reliable data source; and
(B) is not required to undertake new scientific or technical research unless the new scientific or technical research is essential to a reasoned choice among alternatives, and the overall costs and time frame of obtaining it are not unreasonable.
(Pub. L. 91190, title I, § 106, as added Pub. L. 1185, div. C, title III, § 321(b), June 3, 2023, 137 Stat. 39.)