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 ReadingSDNY Certifies Class in Major Crypto Case
The Southern District of New York recently certified a class action involving allegations of market manipulation in the cryptocurrency sector. Judge Katherine Polk Failla’s certification order addresses one of the key challenges in this type of litigation: the intersection between limits on the extraterritorial application of U.S. regulatory law and the requirements for class certification…
Continue ReadingExtraterritorial Application of the Digital Millennium Copyright Act
Congress passed the Digital Millennium Copyright Act (DMCA) in 1998 to criminalize the circumvention of access controls to copyrighted works. Section 1201 provides: “No person shall circumvent a technological measure that effectively controls access to a work protected under this title.” Section 1203 allows a person injured by a violation of that provision to sue…
Continue ReadingFourth Circuit Affirms $42 Million Jury Verdict in Abu Ghraib Case
Editor’s Note: This article also appears in Just Security. Between October and December 2003, interrogators hired by CACI Premier Technology, Inc., along with members of the U.S. military, abused detainees at Abu Ghraib prison in Iraq, subjecting them to sexual assault, forced nudity, dog threats and attacks, prolonged stress positions, and threats. In 2008, some…
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