50 U.S.C. § 843: Application of Internal Security Act of 1950 to members of Communist Party and other subversive organizations; “Communist Party” defined

Whoever knowingly and willfully becomes or remains a member of (1) the Communist Party, or (2) any other organization having for one of its purposes or objectives the establishment, control, conduct, seizure, or overthrow of the Government of the United States, or the government of any State or political subdivision thereof, by the use of force or violence, with knowledge of the purpose or objective of such organization shall be subject to all the provisions and penalties of the Internal Security Act of 1950, as amended [ 50 U.S.C. 781 et seq.], as a member of a “Communist-action” organization. For the purposes of this section, the term “Communist Party” means the organization now known as the Communist Party of the United States of America, the Communist Party of any State or subdivision thereof, and any unit or subdivision of any such organization, whether or not any change is hereafter made in the name thereof.