The documents assert that mandate baldly. A legal factsheet from the NSA, dated June 2013, states that the FISA, which requires judicial oversight over spying on Americans, “only regulates a subset of the NSA’s signals intelligence activities. NSA conducts the majority of its SIGINT activities solely pursuant to the authority provided by Executive Order 12333.”
The National Security Agency has been hit with several lawsuits since leaks began to expose its spy programs last year. Now the latest legal challenge, filed this week, finds fault with the NSA for its unwillingness to explain its use of certain exploits.