In case of a homestead held in joint tenancy, if one spouse becomes incapacitated, upon application of the other spouse to the district court of the county in which the homestead is located, and upon due proof of said incapacity, the court may issue an order permitting said other spouse to sell, convey, lease, lease for oil and gas mining purposes, or mortgage the homestead. For purposes of this section and Sections 3 and 4 of this act "incapacitated" or "incapacity" means impairment due to mental illness, mental deficiency, physical illness or disability, to the extent the individual lacks sufficient understanding or capacity to make or communicate responsible decisions.
Okla. Stat. tit. 16, § 7