Chevron U.S.A. v. Natural Res. Def. Council

Holding that courts "must give effect to the unambiguously expressed intent of Congress"

Lujan v. National Wildlife Federation

Holding the district court did not abuse its discretion in declining to admit affidavits in support of standing when filed after summary judgment briefing and hearing were complete

Motor Vehicle Manufacturers Assoc. of the United States, Inc. v. State Farm Mutual Auto. Ins. Co.

Holding that " `settled course of behavior embodies the agency's informed judgment that, by pursuing that course, it will carry out the policies [of applicable statutes or regulations]'"

Auer v. Robbins

Holding that a federal agency's interpretation of a regulation is controlling where it is not "plainly erroneous or inconsistent with the regulation"

Norton v. Southern Utah Wilderness Alliance

Holding that agency can be compelled to act if time period is specified by law

Citizens to Preserve Overton Park v. Volpe

Holding a decision is committed to agency discretion when there is "no law to apply"

Marsh v. Oregon Natural Resources Council

Holding that courts must defer to the "informed discretion" of federal agencies where the agencies’ decisions require "a high level of technical expertise" (quoting Kleppe v. Sierra Club , 427 U.S. 390, 412, 96 S.Ct. 2718, 49 L.Ed.2d 576 (1976) )

Thomas Jefferson Univ. v. Shalala

Holding that "the agency’s interpretation must be given controlling weight unless it is plainly erroneous or inconsistent with the regulation"

Robertson v. Methow Valley Citizens Council

Holding NEPA does not require a "worst case analysis"

Weinberger v. Romero-Barcelo

Holding that Federal Water Pollution Control Act did not mandate injunctions against its violation

Rule 56 - Summary Judgment

Holding a party may move for summary judgment on any part of any claim or defense in the lawsuit

Section 706 - Scope of review

Granting courts jurisdiction to "compel agency action unlawfully held or unreasonably delayed"

Section 701 - Application; definitions

Adopting the definition given in Section 551

Section 4332 - Cooperation of agencies; reports; availability of information; recommendations; international and national coordination of efforts

Requiring that agencies prepare environmental impact statements where major agency action would significantly affect the environment

Section 4321 - Congressional declaration of purpose

Describing the purposes of NEPA as including "encourag[ing] productive and enjoyable harmony between man and his environment"

Section 1531 - Congressional findings and declaration of purposes and policy

Finding and declaring that "various species of fish, wildlife, and plants in the United States have been rendered extinct" while "other species ... have been so depleted in numbers that they are in danger of or threatened with extinction ...."

Section 1536 - Interagency cooperation

Requiring that every federal agency "insure that any action authorized, funded, or carried out by such agency . . . is not likely to jeopardize the continued existence of any endangered species or threatened species"

Section 1532 - Definitions

Defining "conservation" as "the use of all methods and procedures which are necessary to bring any endangered species or threatened species to the point at which the measures provided pursuant to this chapter are no longer necessary"

Section 1533 - Determination of endangered species and threatened species

Requiring periodic review of listed species

Section 1701 - Congressional declaration of policy

Holding that plaintiffs sufficiently pleaded prudential standing as to the FLPMA due only to their "aesthetic and "recreational interest" in land

Section 402.14 - Formal consultation

Requiring disclosure of Draft Biological Opinions to private applicants if requested

Section 402.02 - Definitions

Defining "action" as "all activities or programs of any kind authorized, funded, or carried out, in whole or in part, by Federal agencies in the United States or upon the high seas. Examples include, but are not limited to . . . actions directly or indirectly causing modifications to the land, water, or air"

Section 17.3 - [Effective 5/13/2024] Definitions

In 50 C.F.R. § 17.3, petitioner Secretary of the Interior further defines "harm" to include "significant habitat modification or degradation where it actually kills or injures wildlife."

Section 402.16 - Reinitiation of consultation

Requiring the Services to reinitiate consultation in specified circumstances, including when "new information reveals effects of the action that may affect listed species or critical habitat in a manner or to an extent not previously considered"

Section 1502.16 - Environmental consequences

Stating that the detailed statement should include: "environmental impacts of the alternatives . . ., any adverse environmental effects which cannot be avoided should the proposal be implemented, the relationship between short-term uses of man's environment and the maintenance and enhancement of long-term productivity, and any irreversible or irretrievable commitments of resources which would be involved in the proposal"

Section 8342.1 - Designation criteria

Section 424.02 - Definitions