Legal Information Institute (LII), based at Cornell Law School, is a pioneering open-access resource for U.S. legal information. It provides free online access to primary legal materials such as the U.S. Code, Supreme Court opinions, the Constitution, and the Code of Federal Regulations, along with expert-written summaries and explanations. As one of the most widely used legal reference sites, LII serves lawyers, students, journalists, and the public by making the law more understandable and accessible to all.