In the course of grappling with those questions, Justice Kavanaugh’s Seven County opinion may provide some insight into how under Loper Bright the Court may distinguish between questions of law that courts must independently decide and exercises of agency discretion subject to laxer arbitrary and capricious review.
Seven County cited Loper Bright for the proposition that “[a]s a general matter, when an agency interprets a statute, judicial review of the agency’s interpretation is de novo.” This appears to be the first time the Supreme Court has expressly tied Loper Bright to de novo review in the body of a majority opinion. (The Loper Bright majority opinion referenced the word de novo only once—in a footnote responding to Justice Kagan’s dissent.) Conversely, the Court observed that “when an agency exercises discretion granted by a statute” the APA’s “deferential arbitrary-and-capricious standard” usually applies, which “asks not whether [a court] agrees with the agency decision, but rather only whether the agency action was reasonable and reasonably explained,” citing State Farm and FCC v. Prometheus. This distinction seems to track Loper Bright’s recognition that some statutes are best read to grant discretionary authority to agencies and how courts should review agency exercises of discretion. It is also consistent with then-Judge Kavanaugh’s observation in his 2016 article “Fixing Statutory Interpretation” that “a judge can engage in appropriately rigorous scrutiny of an agency’s statutory interpretation and simultaneously be very deferential to an agency’s policy choices within the discretion granted to it by the statute.”