Okla. Stat. tit. 15, § 1002

The purposes of this act are to simplify the creation of a power of attorney and, when a form substantially similar to the form set forth in this act is utilized, to assure third parties that they may rely in good faith on the acts of the agent within the scope of the power of attorney. The form set forth in this act is not exclusive, however, and other forms of power of attorney may be used.