Okla. Stat. tit. 18 § 381.52a
In addition to other provisions of the Oklahoma Savings and Loan Code relating to deposit accounts, an association may exercise the powers and authorities applicable under the provisions of Article IX of the Oklahoma Banking Code, Sections 901 through 907 of Title 6 of the Oklahoma Statutes, as amended from time to time. An association may also exercise the powers and authorities applicable under the provisions of Article XIII of the Oklahoma Banking Code, Section 1301 et seq. of Title 6 of the Oklahoma Statutes, as amended from time to time. Further, unless an association shall have expressly agreed in writing to assume special or fiduciary duties or obligations, no such duties or obligations will be imposed on the association with respect to a depositor of the association or a borrower, guarantor or surety, and no special or fiduciary relationship shall be deemed to exist.
Okla. Stat. tit. 18, § 381.52a