Okla. Stat. tit. 21, § 304

Any person who alone or in concert with others wilfully either by force, physical interference, fraud, intimidation, or by means of any independently unlawful act, prevents or attempts to prevent any member, officer or employee of either house of the State Legislature or any committee of either house of the State Legislature from performing any official act, function, power or duty shall be guilty of a misdemeanor.