Earlier this week, the U.S. Supreme Court clarified an important question in sovereign immunity law: when does a state-created entity qualify as an “arm of the State” entitled to share the State’s immunity from suit? In a unanimous 9–0 decision authored by Justice Sotomayor, the Court held that the New Jersey Transit Corporation is not an arm of the State of New Jersey and therefore cannot invoke the State’s sovereign immunity in out-of-state lawsuits. Galette v. New Jersey Transit Corp.
The case arose from two accidents involving New Jersey Transit buses: one happened in New York City, and the other happened in Philadelphia. The injured plaintiffs sued New Jersey Transit in their home states. The transit agency moved to dismiss, arguing that it was an arm of New Jersey and therefore immune from suit under the doctrine of state sovereign immunity. The highest courts of New York and Pennsylvania reached opposite conclusions, prompting the Supreme Court to resolve the conflict.
The Court unanimously rejected the immunity argument. Sovereign immunity, the Court explained, is “personal” to the State and extends only to entities that function as true arms of the State itself — not to legally independent organizations the State chooses to create.
The opinion places significant weight on how the State structures the entity under state law. The clearest signal that an entity is not an arm of the State is when the State creates a corporation with traditional corporate powers, including the ability to sue and be sued, enter contracts, hold property, and incur its own debts. Those features reflect a long-standing principle of corporate law: a separately incorporated entity is a distinct legal person.
The Court also discussed Mt. Healthy City Board of Education v. Doyle, where it framed the arm-of-the-state inquiry as whether an entity is “more like a county or city than like an arm of the State.” Galette, slip op. at 9 (quoting Mt. Healthy City Bd. of Educ. v. Doyle, 429 U.S. 274 (1977)). In Mt. Healthy, the Court observed that the school board was a political subdivision with authority to issue bonds and levy taxes. Although the board received both funding and guidance from the State, those features did not transform it into an arm of the State entitled to sovereign immunity.
That structure was central to the Court’s analysis. New Jersey created NJ Transit as a “body corporate and politic,” granted it broad corporate powers, and expressly provided that its debts and liabilities are not obligations of the State. Because the corporation must satisfy judgments from its own funds rather than the state treasury, the Court concluded that NJ Transit is legally separate from the State.
The State’s extensive oversight did not change the result. New Jersey appoints board members, retains veto authority over certain actions, and provides substantial funding. But the Court cautioned that control alone is not a reliable measure of sovereign status. States routinely exercise oversight over municipalities, school boards, and other public entities that nonetheless remain legally distinct from the State itself.
The decision also rejects arguments that sovereign immunity should turn on the entity’s public function or the amount of state funding it receives. Many entities perform essential governmental functions or depend heavily on state appropriations. Those features do not convert a separate legal entity into the State itself.
For lawyers, the case matters in two directions. It will affect not only government entities asserting sovereign immunity, but also plaintiffs seeking to sue them. Whether a state-created organization is incorporated, whether it has the power to sue and be sued, and whether the State is legally responsible for its liabilities may determine whether sovereign immunity applies at all.
The Court’s reasoning also raises an important structural question going forward. The opinion repeatedly emphasizes the corporate form as the strongest evidence that an entity is legally separate from the State. That emphasis may invite closer scrutiny of unincorporated state entities, commissions, or boards whose legal status is less clearly defined. In those cases, the arm-of-the-state inquiry may become more difficult and (perhaps) more contested.
The broader takeaway is straightforward. States remain free to structure public entities however they choose. But when a State creates a separate corporation to carry out public functions — and requires that corporation to bear its own liabilities — courts are unlikely to treat that entity as the State itself.
Listen to the syllabus here on the Supreme Court Decision Syllabus Podcast, read by Jake A. Leahy.