President Truman recognized the need for a centralized intelligence system. Taking into account the views of the military services, the State Department, and the FBI, he established the Central Intelligence Group (CIG) in January 1946. The CIG had two missions: providing strategic warning and conducting clandestine activities. Unlike the OSS, it had access to all-source intelligence. The CIG functioned under the direction of a National Intelligence Authority composed of a Presidential representative and the Secretaries of State, War and Navy. Rear Admiral Sidney W. Souers, USNR, who was the Deputy Chief of Naval Intelligence, was appointed the first Director of Central Intelligence (DCI). Twenty months later, the National Intelligence Authority and the CIG were disestablished. Under the provisions of the National Security Act of 1947 (which became effective on 18 December 1947), the National Security Council (NSC) and the Central Intelligence Agency (CIA) were created. The 1947 Act charged the CIA with coordinating the nation's intelligence activities and correlating, evaluating, and disseminating intelligence that affects national security. In addition, the Agency was to perform other duties and functions related to intelligence as the NSC might direct. The Act defined the DCI's authority as head of the Intelligence Community, head of the CIA, and principal intelligence adviser to the President, and made him responsible for protecting intelligence sources and methods. The act also prohibited the CIA from en¬gaging in law enforcement activity and restricted its internal security functions. The CIA carried out its responsibilities subject to various directives and controls by the President and the NSC. In 1949, the Central Intelligence Agency Act was passed and supplemented the 1947 Act. The addendum permitted the Agency to use confidential fiscal and administrative procedures and exempted CIA from many of the usual limitations on the expenditure of federal funds. It provided that CIA funds could be included in the budgets of other departments and then transferred to the Agency without regard to the restrictions placed on the initial appropriation. This Act is the statutory authority that allows for the secrecy of the Agency's budget. In 1953, Congress amended the National Security Act to provide for the appointment of the Deputy Director of Central Intelligence (DDCI) by the President with the advice and consent of the Senate. This amendment also provided that commissioned officers of the armed forces, whether active or retired, could not occupy both DCI and DDCI positions at the same time. The DDCI assisted the Director by performing such functions as the DCI assigned or delegated. The DDCI acted and exercised the powers of the Director during his absence or disability, or in the event of a vacancy in the position of the Director. On December 17, 2004, President George W. Bush signed the Intelligence Reform and Terrorism Prevention Act which restructured the Intelligence Community by abolishing the position of Director of Central Intelligence (DCI) and Deputy Director of Central Intelligence (DDCI) and creating the position of Director of the Central Intelligence Agency (D/CIA). The Act also created the position of Director of National Intelligence (DNI), which oversees the Intelligence Community.