Okla. Stat. tit. 21, § 1267.1
Any person organizing or assisting to organize any group, company, assembly of persons, or association with the intent of advocating or encouraging the overthrow of the United States or state governments, or of acting to overthrow such governments, by force or violence, or who is or becomes a member or affiliate of any such organization knowing its purposes shall, upon conviction thereof, be guilty of a felony.
Laws 1961, SJR 32, p. 743, § 1; Amended by Laws 1997, HB 1213, c. 133, § 321 (effective date amended to July 1, 1999, by Laws 1998, 1st Extr. Sess., HB 1002, c. 2, §§ 23-26, emerg. eff. June 19, 1998) (superseded document available).