Last month, US president Joe Biden signed a surveillance bill enhancing the National Security Agency’s power to compel US businesses to wiretap communications going in and out of the country. The changes to the law have left legal experts largely in the dark as to the true limits of this new authority, chiefly when it comes to the types of companies that could be affected. The American Civil Liberties Union and organizations like it say the bill has rendered the statutory language governing the limits of a powerful wiretap tool overly vague, potentially subjecting large swaths of corporate America to warrantless and secretive surveillance practices.