In late March 2026, two significant federal actions reshaped how the federal Endangered Species Act (FESA) Section 7 is implemented across the country. First, a federal district court vacated key portions of the FESA Section 7 consultation regulations, reinstating pre‑2019 standards nationwide.1 Days later, the Endangered Species Committee issued a rare national-security‑based exemption from FESA Section 7 requirements for Gulf of Mexico (Gulf) oil and gas activities. While the district court decision introduces new uncertainty for many federally authorized projects, the national-security exemption will likely provide regulatory certainty for certain oil and gas activities in the Gulf.
Background and Regulatory Context
FESA Section 7(a)(2) requires federal agencies to consult with the U.S. Fish and Wildlife Service and the National Marine Fisheries Service (the Services) to ensure that actions they authorize, fund, or carry out are not likely to jeopardize listed species or destroy or adversely modify designated critical habitat. That statutory obligation has not changed. However, the Services implement Section 7 through regulations that define how consultation is conducted and how key statutory terms are applied. In 2019, the Services revised several of the implementing regulations, and portions of those revisions were retained when new regulations were issued in 2024. Environmental organizations challenged several of the retained regulatory provisions, leading to the March 30, 2026, district court decision vacating portions of the Section 7 regulations and directing agencies to apply the pre‑2019 regulatory framework going forward.
Key Section 7 Changes and Practical Takeaways
1. Broader Evaluation of Action Effects
The court vacated the regulatory definition of “Effects of the Action” (50 CFR Section 402.02) that allowed agencies to limit analysis to effects that were deemed “reasonably certain to occur.” Agencies must now evaluate impacts that are scientifically supported and likely, even where uncertainty remains. This change is expected to broaden the scope of effects analyses in many consultations, particularly for projects facing cumulative, indirect, or climate‑related impact concerns.
2. Mitigation Measures Must Be Binding
Previously, agencies could rely on mitigation measures included in a proposed action without clearly demonstrating that those measures were enforceable or guaranteed. The court rejected this approach, emphasizing that mitigation relied upon to avoid jeopardy must be binding or otherwise reasonably certain to occur. Project proponents should expect increased scrutiny of mitigation commitments and more pressure to formalize mitigation obligations earlier in the permitting process.
3. Narrower Definition for “Adverse Modification of Critical Habitat”
The court also invalidated regulatory language focusing the adverse‑modification analysis on whether impacts diminish the value of critical habitat “as a whole” (50 CFR Section 402.02). That phrase was added in the 2019 regulations to clarify that, in evaluating adverse modification, the Services distinguish between habitat changes that have meaningful biological significance and activities that may technically alter critical habitat but have little or no conservation consequence.
The court, however, concluded that the “as a whole” qualifier improperly permits piecemeal habitat degradation, contrary to the FESA’s categorical prohibition on the destruction or adverse modification of designated critical habitat. As a remedy, the court vacated the provision and expressly reinstated the pre‑2019 regulatory definition.
With that qualifier removed, even localized or incremental impacts to critical habitat may independently support an adverse‑modification finding. Linear infrastructure projects and activities occurring in already fragmented or stressed habitats may be particularly affected, as agencies reassess how site‑specific impacts factor into the consultation analysis.
FESA Section 7 Consultation: Before and After
Under the regulations that existed before the court’s vacatur order, agencies had greater flexibility to discount uncertain impacts, rely on non‑binding mitigation, and assess habitat impacts in a more holistic manner. With the reinstatement of pre‑2019 rules, consultations are expected to become more conservative, documentation‑intensive, and potentially more vulnerable to legal challenge, especially where uncertainty or incremental impacts are present. The Services have also proposed revisions to the FESA implementing regulations (see our blog on that topic here), but those proposals are not yet final and do not alter current consultation requirements. However, in light of the district court’s ruling and vacatur of the existing regulations, we expect that the Services will take that ruling into account when finalizing those pending rulemakings. The recent changes are summarized in the following table.
FESA Section 7 Consultation Requirements: Before and After the March 2026 Court Decision
| Issue | 2019 / 2024 Regulations (Now Vacated) | Pre‑2019 Regulations (Reinstated) | Practical Impact |
| Scope of “Effects of the Action” | Effects limited to impacts that are both but‑for caused by the action and “reasonably certain to occur.” | Effects include direct and indirect impacts that are likely to occur, even if uncertainty exists and impacts are not fully predictable. | Broader impact analyses; agencies and applicants can no longer exclude scientifically supported but uncertain effects from jeopardy or adverse‑modification analyses. |
| Use of Mitigation Measures in Jeopardy Analysis | Mitigation included in the proposed action could be relied upon without demonstrating binding or enforceable commitments. | Mitigation may only be relied on if it is binding, guaranteed, or otherwise reasonably certain to occur. | Applicants must better document, commit to, and in some cases legally bind mitigation measures earlier in the process. |
| “Destruction or Adverse Modification” of Critical Habitat | Adverse modification assessed based on whether impacts diminish habitat value “as a whole.” | Any action that appreciably diminishes the value of critical habitat for conservation may constitute adverse modification, without a “whole habitat” qualifier. | Increased vulnerability to findings of adverse modification based on localized or incremental habitat impacts. |
Gulf Oil and Gas Activities Under the FESA Section 7 Exemption
On March 31, 2026, the Endangered Species Committee—often called the “God Squad”—granted a national security exemption from FESA Section 7 requirements for all oil and gas exploration, development, and production activities associated with the Bureau of Ocean Energy Management and Bureau of Safety and Environmental Enforcement Outer Continental Shelf (OCS) program in the Gulf.2 This represents the first instance in the FESA’s 52-year history that the “national security” provision has been invoked to grant a programmatic exemption. This exemption relieves covered activities from Section 7 consultation requirements and FESA take prohibitions for the duration of the OCS leasing program, while still requiring compliance with existing avoidance and minimization measures.
What This Means for Projects
For federally authorized projects outside the Gulf, the district court vacatur of key FESA Section 7 implementing regulations is the principal development affecting project permitting. That decision is expected to result in more conservative consultation analyses, increased documentation demands, heightened scrutiny of mitigation commitments, and greater emphasis on localized and incremental habitat impacts, which may affect project timelines. In contrast, for oil and gas activities in the Gulf, the national security exemption eliminates Section 7 consultation and take-prohibition requirements for covered actions, providing near‑term regulatory certainty, even as the district court’s order itself remains subject to ongoing litigation.
Strategic Considerations for Project Sponsors
Project proponents should reassess FESA consultation strategies in light of the reinstated rules, ensure mitigation measures are clearly defined and enforceable, and engage early with wildlife agencies to address uncertainty. Building a defensible administrative record and anticipating increased documentation needs will be critical to maintaining schedule certainty.
How ESA Can Help
Environmental Science Associates’ environmental and permitting specialists are closely tracking these developments and working with clients across sectors to navigate evolving FESA consultation requirements. We help project teams anticipate risk, develop robust mitigation strategies, and align permitting approaches with the current regulatory landscape. Reach out to Barbra Calantas, Biological Resources and Land Management Practice Leader at ESA, with any questions.
1 Although there is ongoing legal debate over whether a single district court’s vacatur applies nationwide, the safer and prevailing practice is to assume that the vacated Section 7 regulations are no longer in effect anywhere in the country unless and until a court limits the ruling.
2 Note that since the Order, the Department of the Interior has announced plans to combine the Bureau of Ocean Energy Management and the Bureau of Safety and Environmental Enforcement into a new Marine Mineral Administration within the Department of the Interior.
Pictured above, marsh‑dependent species, including the federally endangered Ridgway’s rail, illustrate how incremental habitat modifications, such as shoreline protection, when coupled with climate uncertainty, can pose significant challenges for conservation planning and permitting. Image by (c) Abram Fleishman/iNaturalist
Author
Wildlife Program Manager
Date
April 23, 2026
