Limitation on use of national security authority

(a) In general Notwithstanding any other provision of law, a national security authority may not be used by a Government official against a citizen of the United States, unless the citizen is intentionally acting as agent of a foreign power or entity. (b) Definition In this section, the term national security authority means— (1) any authority under the National Security Act of 1947 or any authority conferred onto any of the departments, agencies, councils, committees or any other entities created, established, restructured, or otherwise governed by such Act; and (2) any authority exercised by the National Security Division of the Department of Justice, the National Security Branch of the Federal Bureau of Investigation, or the Intelligence Branch of the Federal Bureau of Investigation.