New York v. New Jersey
The Supreme Court ruled unanimously that New Jersey can exit its 1953 agreement with New York governing their shared commercial port, even without New York's consent, because the agreement was silent on withdrawal and created obligations with no set end date.
The decision establishes a default rule for a specific type of interstate arrangement: when two states create an open-ended joint agency and the agreement says nothing about quitting, either state can walk away on its own.
“In sum, background principles of contract law, reinforced here by principles of state sovereignty and the fact that the States did not intend for the Compact to operate forever, indicate that New Jersey may unilaterally withdraw from the Waterfront Commission Compact.”
The majority's summary of the three converging reasons why New Jersey is free to exit the compact without New York's agreement.
How it got here: New York filed a bill of complaint directly in the Supreme Court under its original jurisdiction; the Court temporarily blocked New Jersey's withdrawal while the case proceeded, then allowed the parties to file cross-motions for judgment on the pleadings.
The Case in Depth
What happened
In 1953, New York and New Jersey created a joint regulatory and law-enforcement agency — the Waterfront Commission of New York Harbor — to fight organized crime and corruption at their shared commercial port. The two states delegated broad policing and licensing powers to the Commission indefinitely. By 2018, New Jersey had concluded the agency was outdated and counterproductive: the vast majority of port activity had shifted to its side of the harbor, yet the Commission imposed rules New Jersey saw as obstacles to job growth. New Jersey passed a law to withdraw, and New York sued to stop it.
The question before the Court
Can one state unilaterally quit a joint interstate agreement with another state when the agreement says nothing about whether either side can leave?
The Court's answer
Yes — New Jersey can exit the Waterfront Commission Compact on its own, even over New York's objection. Because the Compact says nothing about withdrawal, the Court filled the gap with a background rule from contract law: a contract calling for ongoing, indefinite performance can be ended by either party at will. The delegation of police and regulatory powers to the Commission had no built-in endpoint, so the default rule permitted New Jersey to leave. The fact that both states acknowledged the Compact was never meant to last forever also made it contradictory to read the silence as giving each state a permanent veto over the other's exit.
Principles of state sovereignty reinforced the same conclusion. Courts interpret interstate compacts against the background assumption that states do not lightly surrender their sovereign governing powers forever without clear language saying so. Because the Compact involved core police powers — protecting people, property, and commerce within a state's borders — an irrevocable, permanent surrender required clear agreement, and none existed here.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
States running open-ended joint agencies under compacts that never addressed how to exit now know that silence means either party can leave. Port workers, businesses, and regulators at the Port of New York and New Jersey will see the Waterfront Commission dissolve and the New Jersey State Police take over law enforcement on the New Jersey side. States drafting future compacts should spell out exit rules explicitly to avoid similar disputes.
What changes now
With the Court's ruling, New Jersey's withdrawal from the Waterfront Commission Compact can proceed. The Commission will dissolve, and the New Jersey State Police will take over the Commission's law-enforcement functions on the New Jersey side of the Port. The ruling is a final merits decision in this original-jurisdiction case, and no further proceedings are required. States with similar open-ended compacts that are silent on withdrawal should now expect either party to be able to exit unilaterally under the rule the Court announced.
What this does not decide
The ruling covers only compacts that are silent on withdrawal and call exclusively for ongoing, indefinite performance. It does not affect compacts that set state boundaries, divide water rights, or otherwise transfer property interests — both states agreed those kinds of compacts require mutual consent to undo. States can also remove all uncertainty by writing explicit exit rules into any compact.
How the Court got there
The legal reasoning, step by step
- The Court started with the Compact's text, which is where all compact interpretation begins — because Congress approved the Compact, disputes about its meaning raise federal legal questions. The text is silent: it mentions neither 'withdrawal' nor 'termination.' It requires both states to agree on amendments and lets Congress alter or repeal the Compact, but neither provision governs whether a single state can exit on its own.
- When the text doesn't answer the disputed question, courts fill the gap with background principles of contract law. Interstate compacts are treated as contracts, so established contract rules inform what the parties understood when they formed their agreement in 1953.
- The governing contract-law rule — in place before 1953 and still in force today — provides that a contract calling for ongoing and indefinite performance can be ended by either party at will. The Waterfront Commission Compact fit this description: both states delegated their police and regulatory powers to the Commission to exercise continuously and indefinitely, with no fixed end date.
- Principles of state sovereignty reinforced this conclusion. Courts read compacts against the background assumption that states do not permanently give up core sovereign authority without clear agreement. Here, the delegation covered fundamental police powers — protecting people, property, and commerce within a state's borders — making a permanent, irrevocable surrender of the right to exit implausible without explicit language to that effect.
- Both states also agreed the Compact was never meant to run forever. The Court reasoned that reading silence on withdrawal as a permanent mutual veto would be inconsistent with that shared understanding: if neither state intended the arrangement to be eternal, it follows that neither state silently gave the other a permanent power to trap it in the agreement.
- The Court explicitly limited its holding to compacts that are silent on withdrawal and call for ongoing, indefinite performance only. The rule does not apply to compacts that set state borders, divide water rights, or otherwise transfer property interests — categories both states agreed require mutual consent to undo, because they do not fit the 'ongoing and indefinite performance' description that triggers the default contract-law exit rule.
Doctrinal impact
Cases affected by this decision
Reaffirms Tarrant Regional Water Dist. v. Herrmann (569 U. S. 614)
Reaffirmed as the governing framework for interpreting interstate compacts using contract-law principles.
Reaffirms New Jersey v. New York (523 U. S. 767)
Reaffirmed for the principle that background contract-law rules 'speak in the silence' of a compact.