Mead Corporation imported paper-bound "day planners" from the Philippines. The U.S. Customs Service, which administers tariff classifications under the Harmonized Tariff Schedule, issued a "classification ruling letter" concluding that Mead's planners were "diaries," a category that carried an ad valorem duty. These ruling letters are issued in high volume by Customs officials without notice-and-comment procedures, are binding only on the addressed party, and may be changed prospectively by the agency. Mead protested the duty assessment, arguing that its planners were not "diaries" within the tariff schedule's meaning and, in any event, Customs' informal ruling letters were not entitled to Chevron deference. The Court of International Trade ruled for Mead, and the Federal Circuit affirmed, declining to give Chevron deference to the ruling letter and independently concluding that the day planners were not properly classifiable as diaries. The United States sought Supreme Court review, principally to secure Chevron deference for Customs' interpretation.
Do Customs classification ruling letters—informal, non–notice-and-comment determinations binding only on the addressee—qualify for Chevron deference, or are they instead entitled at most to Skidmore respect based on their persuasive force?
Chevron deference applies when (1) Congress has delegated authority to the agency generally to make rules carrying the force of law, and (2) the agency interpretation claiming deference was promulgated in the exercise of that authority. Where these conditions are not met, an agency's interpretation may be entitled only to Skidmore deference—the weight accorded to an interpretation proportional to its power to persuade, considering factors such as the thoroughness of the agency's consideration, the validity of its reasoning, consistency over time, and the agency's expertise and care.
Customs classification ruling letters do not warrant Chevron deference because they are not issued through procedures indicating congressional intent that they carry the force of law. Such rulings may, however, merit Skidmore deference to the extent they are persuasive. The judgment was vacated and remanded for the lower court to evaluate the ruling under Skidmore.
The Court, per Justice Souter, began by emphasizing that Chevron's strong form of deference is not automatic for every agency interpretation of a statute it administers. Instead, courts must first determine whether Congress intended the agency to speak with the force of law on the question at issue and whether the agency in fact exercised such delegated authority. This is often evidenced by the use of formal procedures such as notice-and-comment rulemaking or formal adjudication, which both channel deliberation and signal legal effect on the public. Turning to the Customs scheme, the Court acknowledged that Congress authorized Customs to engage in notice-and-comment rulemaking and issue regulations carrying the force of law. But the classification ruling letters at issue were not produced through such procedures. They were informal, issued in high volume by field offices, binding only on the parties to whom they were addressed, lacked precedential effect on third parties, and were subject to change without the procedural safeguards associated with lawmaking. These features undercut any inference that Congress intended such letters to have the force of law and therefore to be eligible for Chevron deference. Nonetheless, the Court rejected the notion that agency interpretations outside Chevron's domain receive no judicial respect. Under Skidmore, an interpretation may earn weight commensurate with its power to persuade. The Court thus directed lower courts to consider factors such as the thoroughness of Customs' consideration of the statutory question, the consistency of its classification over time, the agency's expertise, and the soundness of its reasoning. Because the Federal Circuit had not applied Skidmore's framework, the Supreme Court vacated and remanded. The Court distinguished, but drew support from, Christensen v. Harris County, which similarly declined Chevron deference for informal interpretations, and it resisted the government's broader position (endorsed in part by the dissent) that Chevron should extend to virtually any authoritative agency view. Justice Scalia concurred in the judgment in part and dissented in part, criticizing the majority's force-of-law predicate as indeterminate and arguing for broader Chevron coverage.
Mead is foundational for the threshold inquiry—Chevron step zero—that governs whether Chevron's deferential framework applies at all. It clarifies that formal process and other indications that Congress meant the agency to act with the force of law are key triggers for Chevron. In their absence, courts default to Skidmore's persuasive standard. For students and practitioners, Mead reframes deference analysis as a two-stage inquiry: (1) eligibility for Chevron based on congressional delegation and procedural posture, and (2) if ineligible, application of Skidmore. The decision has broad implications across administrative practice because many agency interpretations arise in informal formats (letters, manuals, FAQs, guidance). Mead ensures these receive measured respect without automatic Chevron deference, promoting accountability and procedural regularity while preserving space for agencies' expertise to influence courts when their reasoning is careful, consistent, and persuasive.
United States v. Mead Corp. reshaped administrative deference by insisting that Chevron's strong deference attaches only when Congress has empowered the agency to speak with the force of law and the agency actually used that power. Where those conditions are absent, courts still consider agency interpretations but do so under Skidmore's flexible, persuasion-based standard.