Extraterritoriality refers to the application of a nation’s law to persons, conduct, or property outside its own territory. Customary international law allows nations to regulate extraterritorially on a number of different bases, including effects, nationality, and universal jurisdiction. Nations generally limit the extraterritorial application of their laws to a greater extent than customary international law requires. For example, the United States applies a presumption against extraterritoriality to federal law and sometimes imposes additional limitations as a matter of prescriptive comity. Some U.S. states have their own presumptions against extraterritoriality, which may differ from the federal presumption.
A Primer on Extraterritoriality
[Updated September 1, 2025] Extraterritoriality refers to the application of a state’s law beyond the state’s borders. Although the word “extraterritorial” often has negative connotations, international law permits a great deal of extraterritorial regulation. In a world where trade, information, crime, and lots of other things regularly cross borders, states often have an interest in…
Continue ReadingU.S. Copyright Transfer Termination Rights as a Choice-of-Law Problem
A transfer of copyright, such as an assignment of copyright or a license of copyright, is often executed with transnational scope. Business transactions in most types of copyrighted works are increasingly global, and it is not surprising that parties want to conduct transactions in copyright for multiple countries. Transfers of copyright, including those that arise…
Continue ReadingCert Grant in Climate Case
The Supreme Court has added a climate case to its docket. In Suncor Energy Inc. v. County Commissioners of Boulder County, local governments sued fossil fuel companies in Colorado state court to recover for damages they sustained as a result of climate change. The complaint includes claims for public and private nuisance, civil conspiracy, unjust…
Continue ReadingEnforcing U.S. Judgments Against “Foreign” Assets of Foreign Sovereigns: a Rejoinder
On June 30, 2025, in Petersen Energia Inversora, S.A.U. v. Argentine Republic, a federal district court in New York ordered the Republic of Argentina to “(i) transfer its Class D shares of YPF to a global custody account at BNYM in New York within 14 days from the date of this order; and (ii) instruct…
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