The main purpose of this legislation is to extend a specific provision of the Foreign Intelligence Surveillance Act (FISA) known as Section 702 for an additional three years. This section allows the U.S. government to collect foreign intelligence information from non-U.S. persons located outside the United States, which is deemed essential for national security. Key provisions of this legislation include the amendment of existing laws to change the expiration date of Section 702 from a previous date to April 20, 2029.