Under Section 702, the government is allowed to circumvent the Fourth Amendment of the Constitution and obtain general warrants issued by the secret FISA court. Proceedings before the FISA court are ex parte—in other words, the government is the only party present—and non-adversarial.
According to senators Ron Wyden and Mark Udall, the federal government relies on "secret legal interpretations" to claim all-encompassing surveillance powers. The secret court permits interception of electronic communications of unidentified targets anywhere in the United States. Moreover, there are no real limits on how the government uses, retains, or disseminates the information that it collects. "This means the government can create huge databases that contain information about U.S. persons obtained without warrants and then search these databases at a later point," the American Civil Liberties Union notes.