Okla. Stat. tit. 6, § 1701

A. This act shall be known and may be cited as the "Multistate Trust Institutions Act". B. It is the express intent of this act to permit banks and other depository institutions, foreign banks and trust companies to engage in the trust business on a multistate and international basis to the extent consistent with the safety and soundness of the trust institutions engaged in a trust business in this state and the protection of consumers, clients and other customers of such trust institutions.