Okla. Stat. tit. 17, § 17-12: Depositions

The Commission is authorized to have depositions taken upon the

application of either party to any cause pending before it, or upon

its own motion; and it is further authorized to designate a person

to take depositions under such rules and regulations as may be

prescribed by the Commission: Provided, that any party to a

proceeding before the Commission may take depositions in the same

manner as in actions pending in the courts of the state.