Loper Bright ruling shifts interpretive burden to courts, witnesses tell House subcommittee

The Subcommittee on Water, Wildlife and Fisheries of the House Natural Resources Committee held an oversight hearing on March 3 to examine implementation of the Endangered Species Act and the Marine Mammal Protection Act and the impact of the Supreme Court's decision in Loper Bright Enterprises v. Raimondo.

The ruling ended judicial deference to agencies'interpretations of ambiguous statutes (the so-called Chevron deference), witnesses told members, placing a renewed burden on Congress to write clearer laws. "Now that that task has been accomplished, the Congress can reassert itself as the founders believed it would and should set the course for law and policies of the federal government in protecting, exploiting, and managing the nation's natural resources," said John Vecchione, senior litigation counsel, New Civil Liberties Alliance.

Why it matters: multiple witnesses and members said the decision will reduce the ability of agencies to resolve statutory ambiguities through administration and could lead to more litigation unless Congress acts to clarify statutory text and reauthorize or amend legacy environmental laws.

Professor Daniel Rolfe of Lewis & Clark Law School told the subcommittee that the ESA itself is clear on its purpose. "The plain intent of Congress in enacting this statute was to halt and reverse the trend towards species extinction, whatever the cost," he said, summarizing the Supreme Court's reading of the statute.

Witnesses and members described three likely consequences: (1) courts will supply the authoritative interpretation of ambiguous statutory text rather than deferring to agencies, (2) agencies may be limited in issuing wide-reaching rules that rest on ambiguous statutory terms, and (3) Congress will face political pressure to revise statutory language where agencies previously relied on regulatory or administrative interpretation.

Several witnesses urged legislative reauthorization as a measured response. Paul Weiland, an environmental lawyer formerly in DOJ's Environment and Natural Resources Division, described the ESA and MMPA as "products of the 1970s" that have not been extensively reauthorized and said that patchwork agency and judicial interpretation has filled gaps left by imprecise statutory language.

Members on both sides of the aisle said they want clearer statutory language but differed on the desired direction. Ranking Member Representative Marcy Kaptur Hoyle (appearing as "Hoyle" in the record) said the ESA is already clear and urged preserving its core protections; others, including Chairman Hageman and Rep. Bruce Westerman, argued for narrowing or clarifying definitions to reduce regulatory burden. The hearing included frequent references to TVA v. Hill (1978) as precedent for Congress responding to court rulings by amending statutes to restore policy balance.

The hearing record shows agreement that Loper Bright changes the institutional dynamics of administrative law, but not unanimity on whether Congress should respond by tightening protections, adding procedural constraints, or leaving existing protections intact while funding implementation.

The subcommittee said it will consider legislative fixes and directed witnesses and members to submit written materials for the hearing record.