Okla. Stat. tit. 17, § 162

The Corporation Commission is authorized and empowered to assign persons in its regular employ as administrative law judges who shall have power to administer oaths, examine witnesses, and receive evidence and report the same to the Corporation Commission, under such rules as the Commission may adopt. A person or persons so assigned shall not be entitled to any compensation other than the regular salary for the position for which they may be regularly employed for performing the services of administrative law judge.