Mccarran Act / Subversive Activities Control Act of 1950 Law and Legal Definition
The Mccarran Act also known as the Internal Security Act or Subversive Activities Control Act of 1950 is a United States federal law that required among other things the registration of Communist organizations with the United States Attorney General. The Act established the Subversive Activities Control Board to investigate persons suspected of engaging in subversive activities or otherwise promoting the establishment of a "totalitarian dictatorship," fascist or communist. Members of these groups could not become citizens, and in some cases, were prevented from entering or leaving the country. Citizen-members could be denaturalized in five years. The Act was passed in 1950, during the Cold War. Over the years, the U.S. Supreme Court declared various portions of the Act unconstitutional, but it was not fully repealed until 1993.
The Act is named after Patrick Anthony McCarran a Democratic United States Senator from Nevada from 1933 until 1954, noted for his strong anti-Communist stance.