 The HSC was similar to its national security counterpart, the National Security Council (NSC), which was established in the National Security Act of 1947.The HSC also maintained structural similarities with the NSC; the HSC consisted of full-time staff organized by subject areas relating to homeland security missions, with the Council itself being composed of Cabinet members and senior White House officials whose departments have principal interests in homeland security policy-making.During the Bush administration, the Council was chaired by the Homeland Security Advisor.