United States v. California: Federal Officer Identification Rule Enjoined Under Intergovernmental Immunity

A California requirement that nonuniformed federal officers visibly display their agency and name or badge number cannot be enforced against federal agencies and officers under the preliminary-injunction ruling in United States v. California, No. 26-926 (9th Cir. Oct. 14, 2026). The Ninth Circuit reversed the denial of preliminary relief and directed the district court to enjoin Section 10 of the No Vigilantes Act against those federal actors. The decision concerns state regulation of federal operations; it does not adjudicate whether a particular immigration arrest or removal proceeding was lawful.

The appeal concerned the identification provision, not every part of the two California laws

California enacted both the No Vigilantes Act, S.B. 805, and the No Secret Police Act, S.B. 627. Section 10 of S.B. 805, codified at Penal Code section 13654, generally requires a nonuniformed law enforcement officer to display identification that includes the agency and either a name or badge number. Its definition includes federal officers, and a willful and knowing violation can carry state criminal consequences. The statute contains exceptions and a safe harbor tied to an agency's published identification policy. United States v. California, No. 26-926, slip op. at 5–9 (9th Cir. Oct. 14, 2026).

The district court had separately enjoined the facial-covering prohibition in S.B. 627 against federal officers. Neither party appealed those S.B. 627 rulings in this appeal. The United States also did not challenge the district court's standing ruling concerning the separate policy-publication provision in Section 2 of S.B. 805. The October 14 appellate disposition therefore should not be described as a new ruling on every masking, identification, and policy provision. Id. at 9–11.

Direct state regulation of federal law enforcement was the decisive distinction

The panel applied intergovernmental immunity under the Supremacy Clause. Its analysis distinguished a law directly controlling federal governmental operations from regulation of private contractors or other third parties. Section 10 expressly addressed federal officers carrying out law enforcement duties and prescribed how those duties must be performed. Congress had not authorized that state regulation. Id. at 12–16.

The district court had focused on whether the identification requirement substantially interfered with federal operations. The Ninth Circuit held that this was the wrong test for direct regulation of the federal government itself: The degree of burden did not save the requirement. It did not resolve whether generally applicable rules that only incidentally affect federal operations might fall outside the prohibition; the identification law was not such a rule. Id. at 16–19.

Because this was a facial challenge brought before enforcement, the United States had to show that the provision was invalid in every relevant application. Applying the standard described in United States v. Salerno, the panel found that burden met for federal agencies and officers performing federal law-enforcement duties. Id. at 12, 15–16.

The result was an injunction instruction, not an individual arrest judgment

The court had already entered an injunction pending appeal on April 22, 2026, in United States v. California, 173 F.4th 1060 (9th Cir. 2026). That reporter citation identifies the earlier April opinion, not the October 14 opinion. The October panel fully adopted the earlier analysis, including for precedential purposes, when deciding the appeal from the preliminary-injunction denial; it was not issuing the first operative injunction. It directed the district court to enjoin application or enforcement of Section 10 against the United States, federal agencies, and federal officers. The panel found the remaining preliminary-injunction factors favored the United States as well. Id. at 11, 19–21.

That scope matters for a person assessing an ICE encounter. Whether the officer displayed identification, identified an immigration arrest, had authority to enter a particular place, or used lawful arrest procedures involves separate facts and legal questions. This opinion does not decide an individual's suppression request, release claim, or immigration relief eligibility.

Keep the identification issue separate from the immigration case

A useful consultation begins with a precise account of the encounter and the documents actually issued, rather than an assumption that a missing badge ends a removal case. Our related guide to officer identification after the California ruling explains the distinction between the enjoined state display rule and the federal arrest-identification regulation. For help evaluating the encounter and the pending proceeding together, review our immigration defense services.