Amends the Foreign Intelligence Surveillance Act of 1978 (FISA) to redefine "electronic surveillance" as: (1) the installation or use of an electronic, mechanical, or other surveillance device for acquiring information by intentionally directing surveillance at a particular person believed to be in the United States when that person has a reasonable expectation of privacy and a warrant would be required for law enforcement purposes; or (2) the intentional acquisition of the contents of any communication when that person has a reasonable expectation of privacy and a warrant would be required for law enforcement purposes, if both the sender and all intended recipients are believed to be in the United States.