The Brand X case and agency authority after Loper Bright now sit in tension: Brand X once let a federal agency adopt a reading of a statute that differed from a prior court’s reading, so long as the statute was ambiguous, but that power rested on Chevron deference, and the Supreme Court’s 2024 decision in Loper Bright Enterprises v. Raimondo ended Chevron.1Cornell Law School. Loper Bright Enterprises v. Raimondo With courts no longer required to defer to agency interpretations of unclear statutes, the mechanism Brand X depended on is largely gone.
What Brand X Held
In National Cable & Telecommunications Ass’n v. Brand X Internet Services, the Supreme Court addressed what happens when a court has already interpreted a statute and an agency later wants to read it differently. The Court held that a prior judicial interpretation blocks a contrary agency rule only if the earlier court found the statute unambiguous. If the earlier decision left the statute open to more than one reading, the agency remained free to adopt its own interpretation later.2Justia. Nat’l Cable & Telecomms. Ass’n v. Brand X Internet Servs.
The reasoning was that agencies need flexibility to adapt as circumstances change. Treating a court’s initial reading of an ambiguous statute as permanent would strip agencies of the interpretive role Chevron had given them. For nearly two decades, the doctrine allowed federal regulators to update rules even where a court had already spoken, provided the statute itself was not strictly clear.2Justia. Nat’l Cable & Telecomms. Ass’n v. Brand X Internet Servs.
Why Brand X Depended on Chevron
Under Chevron, courts asked first whether Congress had directly spoken to the question. If the statute was clear, that reading controlled. If it was ambiguous, courts accepted any reasonable agency interpretation.3Justia. Chevron U.S.A., Inc. v. Natural Resources Defense Council, Inc. Brand X built on that structure. An agency could displace a prior court reading only because Chevron treated ambiguity as space Congress had left for the agency to fill. The prior court decision, if it had not declared the statute unambiguous, was just one reasonable reading among several the agency could choose from.
What Loper Bright Changed
Loper Bright ended the Chevron framework. Federal courts are no longer required to defer to an agency’s view of an unclear statute. Instead, judges must apply independent judgment to determine what the law means and settle on the best reading.1Cornell Law School. Loper Bright Enterprises v. Raimondo
That change pulls the foundation out from under Brand X. The doctrine only mattered because ambiguity triggered deference. Once ambiguity no longer triggers deference, an agency cannot rely on a statute’s openness as authority to override a court’s interpretation. Courts may still consider an agency’s reading if they find it persuasive, but the interpretive power Brand X shifted toward the executive branch now sits with the judiciary.1Cornell Law School. Loper Bright Enterprises v. Raimondo
What Remains of Agency Authority
Agencies have not been stripped of every interpretive role. Where Congress has specifically delegated authority to an agency to resolve a particular question, that delegation still operates.1Cornell Law School. Loper Bright Enterprises v. Raimondo What has changed is the default. The general duty to interpret federal statutes now belongs to the courts, and an agency can no longer use a new regulation to override a prior judicial reading simply by pointing to ambiguity in the underlying law.
Practical Effect on Prior Court Interpretations
Once a court settles on a reading of a statute, that reading is much more likely to hold. Under Brand X, an agency could return later and adopt a different interpretation whenever the statute was ambiguous. Under Loper Bright, the court’s best-reading determination is the interpretation, and an agency rule that conflicts with it does not receive the deference that once made displacement possible.1Cornell Law School. Loper Bright Enterprises v. Raimondo Brand X has not been formally overruled, but its practical operating room has narrowed sharply along with the deference regime that gave it force.