All conservatorships created prior to the effective date of the Oklahoma Guardianship and Conservatorship Act, Section 1-101 et seq. of this title, with the consent of the person for whose property a conservator was appointed, are hereby validated. Each such conservatorship shall be presumed to have been created by consent unless otherwise established by documents filed in the conservatorship action or by other evidence.
Okla. Stat. tit. 30, § 3-220