United States v. Louisiana
The Court ruled that the United States owes Louisiana no interest or 'use of money' payment on decades of impounded offshore oil-lease funds, but that Louisiana must account for and repay the federal government roughly $19 million it collected from a coastal zone that turned out to belong to the United States, not the state.
The ruling caps a more than thirty-year legal battle over who owns the seabed off Louisiana's coast and how the two governments must square accounts for oil and gas money collected while ownership was still in dispute.
How it got here: A Special Master appointed by the Supreme Court in this original-jurisdiction suit issued a report resolving remaining accounting disputes; both Louisiana and the United States filed exceptions to parts of it.
The Case in Depth
What happened
Since the late 1940s, the United States and Louisiana have fought over who owns the oil-rich seabed off Louisiana's Gulf Coast and who is entitled to the lease money it generates. While courts sorted out the exact boundary, the two governments used a 1956 Interim Agreement to hold ('impound') disputed lease payments and let Louisiana temporarily administer a coastal strip called Zone 1.
The question before the Court
In this decades-long fight over Gulf of Mexico oil-lease money, did the federal government owe Louisiana interest on funds it held for years, and did Louisiana have to pay back money it collected from ocean-floor tracts later ruled to belong to the United States?
Why it matters
The decision settles two lingering money disputes from a decades-old federal-state turf war over offshore oil revenue. Louisiana loses its roughly $88 million interest claim, showing that the federal government generally can't be forced to pay interest without a specific law or contract saying so, while Louisiana now owes the U.S. about $19 million for oil money it collected from land that wasn't actually its own.
What changes now
The case is sent back to the Special Master to work out the exact amount Louisiana owes the United States for Zone 1 revenue and how payment should be made, including possible offsets from other unresolved accounts between the two governments. This is a final ruling on the legal questions presented, even though remaining bookkeeping details still must be finished before the long-running case can formally close.
What this does not decide
The Court did not decide the exact dollar amount Louisiana must ultimately pay, nor how any offsets from related 'split lease' accounts should be applied — those calculations were left to the Special Master and the parties to work out on remand.
Concurrences and dissents
How the Justices voted
Majority (1). Justice Blackmun (author).
Separate writings (1). Justice Powell (author of a opinion).
Concurrence in part — Justice Powell
Justice Powell agreed with the Court's rejection of Louisiana's interest claim and with accepting the severance-tax ruling, but would have deferred to the Special Master's finding that Louisiana owed nothing for Zone 1 revenue. He argued the Master's closer familiarity with the record deserved weight, and while not free from doubt, the finding was not erroneous enough to overturn.
How the Court got there
The legal reasoning, step by step
- The Court applied the long-standing rule that, absent a specific statute or contract provision, the federal government cannot be made to pay interest on money it holds, even money owed to another party — a form of sovereign immunity that protects the Treasury from interest claims unless Congress or an agreement clearly allows them.
- Reading the 1956 Interim Agreement's own words, the Court found no promise to pay interest, invest the funds, or treat them as a trust; the word 'impound' simply meant the money was held in official custody, not placed in an interest-bearing account, so Louisiana's trust and escrow arguments failed.
- The Court noted Louisiana's own conduct — accepting large payments for years without objecting to the lack of interest, and only raising the issue in 1975 — supported reading the agreement as deliberately silent on interest rather than implicitly requiring it.
- On the second dispute, the Court traced Louisiana's duty to account for lease revenue back to the Court's original 1950 decree, which required either government to pay over money collected from land ultimately awarded to the other side, and found nothing in the Submerged Lands Act or the Interim Agreement that erased that duty for Zone 1.
- The Court read a provision of the Outer Continental Shelf Lands Act, which the Special Master had relied on, as protecting lessees from being penalized for making payments under the interim arrangement — not as forgiving Louisiana's separate obligation to eventually pay the true owner.
- Because Louisiana never received an explicit waiver of the government's claim to Zone 1 revenue, and the agreement itself said no provision should be read as waiving either side's claims, the Court concluded Louisiana still owed an accounting for the disputed Zone 1 money.
Doctrinal impact
Cases affected by this decision
Reaffirms United States v. California (332 U. S. 19)
The Court relied on this 1947 ruling as the original source of the federal government's paramount rights and accounting entitlement.