No state officer or employee shall receive or agree to receive compensation to represent or assist another individual or other entity in any transaction involving the state or to represent another individual or other entity before any state agency, unless authorized by law. The prohibitions in this section shall not apply to the practice of law before any court, nor shall they apply to members of boards, commissions, authorities and similar public bodies of state agencies for representation before state agencies other than the agency the member serves.
Okla. Stat. tit. 74E, § 4.18