The United States National Security Council was established following the coordination of the foreign policy system in the United States in 1947 under the National Security Act of 1947. An administrative agency guiding national security issues was found to be needed since world war II. The national Security Act of 1947 provides the council with powers of setting up and adjusting foreign policies and reconcile diplomatic and military establishments. It established a Secretary of Defence, a National Military Establishment which serves as central intelligence agency and a National Security Resources Board. The specific structure of the United States National Security Council can be different depending on the elected party of the time. Different party emphasize on different aspects of policy making and administrating.