INS v. Orlando Ventura

Holding that proper remedy is to remand to agency for additional investigation of matter not previously considered

United States v. Mead Corp.

Holding that a Customs classification ruling "has no claim to judicial deference under Chevron " but can "claim respect according to its persuasiveness"

Lamie v. U.S. Trustee

Holding that courts should not add an "absent word" to a statute

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) )

City of Erie v. Pap's A. M.

Holding that an ordinance barring full nudity at nude dancing clubs does not violate the First Amendment

Robertson v. Methow Valley Citizens Council

Holding NEPA does not require a "worst case analysis"

Department of Transportation v. Public Citizen

Holding that, under the National Environmental Policy Act, an agency cannot be considered the legal "cause" of an action that it has no statutory discretion to avoid

Baltimore Gas & Electric Co. v. Natural Resources Defense Council, Inc.

Holding that "a reviewing court must generally be at its most deferential" when examining an agency decision made "within its area of special expertise, at the frontiers of science"

Skidmore v. Swift Co.

Holding that "the rulings, interpretations and opinions of the Administrator" of the statute in question, "while not controlling upon the courts by reason of their authority," were nonetheless available for guidance to the extent they had the "power to persuade"

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 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 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 1801 - Findings, purposes and policy

Finding the economies of "[m]any coastal areas . . . have been badly damaged by the overfishing of fishery resources," particularly by "[t]he activities of massive foreign fishing fleets"

Section 1855 - Other requirements and authority

Adopting the standards for judicial review under 5 U.S.C. § 706

Section 1852 - Regional Fishery Management Councils

Requiring the councils to conduct public hearings "to allow all interested persons an opportunity to be heard in the development of fishery management plans"

Section 1854 - Action by Secretary

Allowing fee "to recover the actual costs directly related to the management, data collection, and enforcement of any limited access privilege program," without limiting fee to payment for observers

Section 1501.4 - Categorical exclusions

Explaining that agencies may prepare a concise environmental assessment to determine if a more detailed environmental impact is required

Section 402.14 - Formal consultation

Requiring disclosure of Draft Biological Opinions to private applicants if requested

Section 402.16 - Reinitiation of formal 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 402.13 - Informal consultation

Explaining that the consultation requirement is satisfied if during the informal consultation the Service concurs in writing that the action "is not likely to adversely affect" a listed species

Section 1501.1 - NEPA thresholds

Requiring comments to "[i]dentify[] at an early stage the significant environmental issues"

Section 1506.11 - Timing of agency action

Section 600.920 - Federal agency consultation with the Secretary

Listing additional information—including an analysis of alternatives—to be included “[i]f appropriate”

Section 46.150 - Emergency responses