Okla. Stat. tit. 6, § 6-1009: Official's oath or affidavit

In any case in which the laws of a state require that a

corporation acting as trustee, executor, administrator, or in any

capacity specified in this article shall take an oath or make an

affidavit, the president, vice-president, cashier, or trust officer

of such bank or trust company may take the necessary oath or execute

the necessary affidavit.