The Communist Control Act of 1954 (68 Stat. 775, 50 U.S.C. 841-844) is an American law signed by President Dwight Eisenhower on 24 August 1954 that outlaws the Communist Party of the United States and criminalizes membership in or support for the party or "Communist-action" organizations and defines evidence to be considered by a jury in determining participation in the activities, planning, actions, objectives, or purposes of such organizations.