Okla. Stat. tit. 60, § 1602.1

A. The court may intervene in the administration or construction of a trust to the extent its jurisdiction is invoked by an interested person or as provided by law. B. A trust is not subject to continuing judicial supervision unless ordered by the court. C. A judicial proceeding involving a trust may relate to any matter involving the trust's administration or construction, including a request for instructions and an action to declare rights.