Okla. Stat. tit. 44, § 245
No person shall be commissioned or enlisted in such forces who has been expelled or dishonorably discharged from any military organization of this state, or of another state, or of the United States.
Laws 1941, SB 296, p. 170, § 5, emerg. eff. June 4, 1941; Amended by Laws 2010, HB 2292, c. 212, § 9, emerg. eff. May 6, 2010 (superseded document available).