Choice of Law under OCSLA
The Outer Continental Shelf Lands Act (OCSLA) decides which law governs injuries and contracts on the United States outer continental shelf. Congress placed that seabed under federal sovereignty. State waters stop at a fixed distance from shore. Beyond that line, OCSLA supplies the legal frame. Houston lawyers meet the statute in offshore-platform and mineral-operations cases.
Federal law comes first. OCSLA adopts the Constitution and the laws of the United States as the base rules for the outer shelf. Where federal law leaves a gap, the law of the adjacent state is borrowed. That borrowed law does not apply as state law. It applies as surrogate federal law. The Supreme Court set this structure so a platform off Louisiana is not a legal vacuum. Tort duties, limitation periods, and some contract rules can then be filled in.
The adjacent-state step has limits. Borrowed state law falls away if it conflicts with federal law. It also falls away if it conflicts with OCSLA itself. General maritime law is federal law. When a claim is truly maritime, maritime rules can displace the state gap-filler. Courts therefore ask two questions in order. First: does OCSLA cover this place and this activity? Second: is there already a federal rule, including admiralty, that leaves no room for the state statute?
Situs starts the analysis. Classic platform cases treat a fixed rig on the shelf as an OCSLA location. An injury on that structure often sits inside the Act. Work that is the direct result of mineral operations on the shelf can also come within OCSLA even when the last event is argued in finer terms. Later cases refined how far “but for” offshore work can stretch. The facts still control. A vessel in navigation is not the same as a fixed platform. Status as a seaman under the Jones Act can pull the case toward maritime remedies instead of a borrowed state workers’ compensation scheme.
The adjacent state is usually the nearest coastal state whose waters lie inward of the site. Louisiana and Texas law therefore appear often in Gulf cases. Those codes arrive only as gap-fillers. A state cap on damages, a unique limitation period, or a special oilfield-indemnity statute may or may not survive. The court tests each rule against federal uniformity and against OCSLA’s text.
Choice of law is not the same as choice of forum. A plaintiff may sue in state court or federal court. The governing law can still be OCSLA’s federal-plus-adjacent-state mix. Parties cannot assume that a Texas courtroom automatically means pure Texas tort law for a shelf platform. They also cannot assume that every offshore injury is a Jones Act case. The statute, the structure, and the work must be mapped first.
In short, OCSLA makes federal law supreme on the outer shelf. Adjacent-state law fills holes as federal law. Conflict with a federal statute or with maritime doctrine knocks the state rule out. Fixed-platform injury often follows this path. Vessel and seaman cases may follow another. Correct choice of law begins with situs and activity, not with the nearest courthouse.