Okla. Stat. tit. 30, § 30-4-707: Execution of waivers or consents for wards

The duly appointed and acting guardian, limited guardian,

conservator, attorney in fact, or any other person legally

authorized to act on behalf of any minor or incapacitated or

partially incapacitated heir, devisee or legatee may execute waivers

or consents for his ward as authorized by the court. There shall be

attached to each waiver or consent a certified copy of the

instrument authorizing him to perform such act.