Lawrence Houston, head counsel of the SSU, CIG, and, later CIA, was a principle draftsman of the National Security Act of 1947 which dissolved the NIA and the CIG, and established both the National Security Council and the Central Intelligence Agency. In 1949, Houston would help draft the Central Intelligence Agency Act, (Public law 81-110) which authorized the agency to use confidential fiscal and administrative procedures, and exempted it from most limitations on the use of Federal funds. It also exempted the CIA from having to disclose its "organization, functions, officials, titles, salaries, or numbers of personnel employed." It created the program "PL-110", to handle defectors and other "essential aliens" who fell outside normal immigration procedures.

Which act got rid of the NIA and the CIG?