Under the Fourth Amendment, search and seizure (including arrest) should be limited in scope to specific information supplied to the issuing court. This is usually by a law enforcement officer who has sworn by it. Fourth Amendment case law deals with three central questions. What government activities constitute "search" and "seizure"? What constitutes probable cause for these actions? How should violations of Fourth Amendment rights be addressed? Early court decisions limited the amendment's scope to a law enforcement officer's physical intrusion onto private property. But with "Katz v. United States" (1967), the Supreme Court held that its protections, such as the warrant requirement, extend to the privacy of individuals as well as physical locations. Law enforcement officers need a warrant for most search and seizure activities. But the Court has defined a series of exceptions for consent searches, motor vehicle searches, evidence in plain view, exigent circumstances, border searches, and other situations.