Navigating NEPA Changes:  Congressional, Regulatory, and Supreme Court Revisions and Rulings

Description

The start of President Donald Trump’s second term has introduced a wave of regulatory, legislative, and judicial changes affecting the National Environmental Policy Act (NEPA). These shifts have created substantial uncertainty regarding how NEPA practice will evolve.

Most significantly, in February 2025, the White House Council on Environmental Quality (CEQ) issued an Interim Final Rule rescinding CEQ’s NEPA Implementing Regulations, which have guided federal NEPA compliance for over four decades. This rule was driven by two recent federal court decisions (late 2024 and early 2025), which held that CEQ never had statutory authority to issue binding NEPA regulations, as Congress did not explicitly grant this power in the NEPA statute. In response, CEQ issued a guidance memorandum directing federal agencies on how to comply with NEPA during a one-year transition period, while agencies work to revise or establish their own NEPA-specific regulations and procedures.

These changes build upon several years of NEPA-related developments, including:

• Congressional Amendments to NEPA (Fiscal Responsibility Act of 2023 – the first-ever substantive amendment to the NEPA statute).

• The Biden Administration’s “Phase 2” NEPA Rulemaking, which introduced major revisions that took effect for new NEPA reviews beginning July 1, 2024.

• Reversals and modifications of the 2020 Trump-era NEPA regulations by the Biden Administration, particularly in areas related to climate change and environmental justice analysis.

In addition to legislative and regulatory shifts, recent federal court rulings have had significant implications for NEPA implementation. Key decisions include:

1. State of Iowa et al. v. CEQ (2025)

• U.S. District Court for the District of North Dakota issued a nationwide injunction on the Biden Administration’s Phase 2 NEPA Rule, ruling that CEQ had violated the NEPA statute and the Administrative Procedure Act (APA).

• The ruling required federal agencies to revert to the NEPA regulations in effect as of June 30, 2024 (i.e., Biden’s Phase 1 rulemaking from May 20, 2022).

2. Marin Audubon Society v. Federal Aviation Administration (2024)

• U.S. Court of Appeals for the D.C. Circuit ruled that CEQ lacks statutory authority to create binding NEPA regulations, as Congress never explicitly delegated that authority in the NEPA statute.

3. Loper Bright Enterprises v. Raimondo (2024)

• The U.S. Supreme Court overturned Chevron deference, limiting the ability of federal agencies to interpret vague statutory language without clear congressional authorization.

4. Corner Post, Inc. v. Board of Governors of the Federal Reserve System (2024)

• Expanded the timeframe in which plaintiffs can challenge federal agency decisions, including NEPA-based approvals and rulemakings.

5. Seven County Infrastructure Coalition v. Eagle County (2025 – Pending Supreme Court Review)

• The first NEPA-specific Supreme Court case in 20 years.

• Will address the scope of indirect impact analysis when a federal agency has limited control over environmental effects.

Given the scope, complexity, and implications of these removals and changes to the CEQ NEPA Implementing Regulations, NEPA Statute, and recent and upcoming federal court decisions, there will be considerable uncertainty and debate about the implications of all of this change for NEPA practice. This workshop aims to clarify these issues as much as possible, providing participants with a comprehensive understanding of these changes to NEPA practice and their implications for how practitioners can best respond to this ever-evolving situation. While some of the changes and implications are straightforward, others require in-depth analysis and discussion, and are likely to continue to generate uncertainty and likely litigation for many years into the future.

Objectives

Upon completing this workshop, participants will be able to:

  • Interpret the implications of the CEQ NEPA regulation rescission, recent federal court rulings, and legislative amendments.

  • Distinguish between clear legal requirements and areas of uncertainty, assessing their impact on NEPA compliance.

  • Develop risk management strategies for navigating NEPA implementation without government-wide CEQ regulations and relying solely on agency-specific procedures.

  • Understand the broader impact of recent Supreme Court rulings, including the repeal of Chevron deference and changes to legal standing and judicial review under NEPA.

Content

The basic format of this interactive workshop includes the following components:

  • Unit 1: NEPA’s Evolving Regulatory Landscape

    • Overview of recent changes to CEQ’s NEPA Implementing Regulations, including the rescission rule.

    • Summary of congressional amendments made to the NEPA statute through the Fiscal Responsibility Act of 2023.

    • Comparison of Trump (2020), Biden Phase 1 (2022), and Biden Phase 2 (2024) CEQ NEPA implementing regulations.

    Unit 2: Court Decisions Impacting NEPA Implementation

    • Analysis of key U.S. District Court, U.S. Court of Appeals, and Supreme Court decisions shaping NEPA compliance.

    • Legal interpretation of the State of Iowa v. CEQ ruling, invalidating the Biden Phase 2 NEPA regulations.

    • Discussion of the Loper Bright Enterprises ruling, eliminating Chevron deference and its effect on agency rulemaking.

    Unit 3: Adapting to NEPA Implementation Without CEQ Regulations

    • Agency-specific NEPA regulations: What to expect as agencies revise or create their own processes.

    • Guidance on conducting NEPA reviews during the transition period without CEQ regulations.

    • Risk management approaches for NEPA practitioners and project proponents.

    • Best practices for documenting compliance and minimizing litigation risks.

 

Audience

Participants for this training generally include resource specialists, team leaders, project managers, decisionmakers, attorneys, writers and editors, and other agency professionals who already have some NEPA experience and need to understand these important changes to how NEPA is implemented to fully execute their responsibilities in an optimal manner.

Process

This is an interactive workshop designed to build an overall understanding of the implications of the recent reforms to NEPA implementation. This workshop consists of a carefully designed combination of the following:

  • 70% Lecture

  • 30% Discussion

Materials

Participants receive the following:

  • Slide presentation handouts

  • Student reference manual – includes relevant statutory and regulatory documents