As used in this title, "subversive organization" means every corporation, association, society, camp, group, bund, political party, assembly, and every body or organization composed of two or more persons or members, which comes within either or both of the following descriptions:

(a) Which directly or indirectly advocates, advises, teaches, or practices, the duty, necessity, or propriety of controlling, conducting, seizing, or overthrowing the Government of the United States, of this State, or of any political subdivision thereof by force or violence.

(b) Which is subject to foreign control as defined in Section 35003.