Okla. Stat. tit. 18, § 814
No professional entity may do any act which is prohibited to be done by individual persons licensed to practice a profession which the professional entity is organized to render.
Laws 1961, SB 399, p. 206, § 14, emerg. eff. July 26, 1961; Amended by Laws 1981, SB 185, c. 312, § 8, eff. October 1, 1981; Amended by Laws 1995, HB 1357, c. 339, § 11, eff. November 1, 1995.