The Supreme Court unanimously ruled that the Subversive Activities Control Board could not prosecute CommunistCommunism Party members for failing to register with the board as mandated by the McCarran ActMcCarran Act[MacCarran Act] of 1950. The Court held that forced registration meant self-incrimination in other prosecutions. Even provisions granting registrants immunity from prosecution were inadequate to protect Communist Party members from violations of their Fifth Amendment right against self-incrimination.Assembly and association, freedom of;Albertson v. Subversive Activities Control Board[Albertson v. Subversive Activities Control Board]

In an earlier decision, Communist Party v. Subversive Activities Control Board[case]Communist Party v. Subversive Activities Control Board[Communist Party v. Subversive Activities Control Board] (1961), the Court had upheld the registration provisions of the act but declined to reach a conclusion on whether anyone could be prosecuted for refusing to register. Many legal authorities correctly surmised that the Court might not actually allow prosecutions. When enforcement of the act was attempted, the Court blocked it. Recognizing that the act was unenforceable, President Richard M. Nixon and Congress allowed the board to expire in the early 1970’s.

Aptheker v. Secretary of State

Assembly and association, freedom of

Cold War

Communist Party v. Subversive Activities Control Board

Dennis v. United States

Scales v. United States

Self-incrimination, immunity against

Yates v. United States