Okla. Stat. tit. 18, § 381.24g

A. Any association subsidiary of an association holding company may receive deposits, renew time deposits, close loans, service loans, and receive payments on loans and other obligations as an agent for any other bank or association owned or controlled by the same holding company. B. Despite any other provision of law, an association as an agent in accordance with subsection A of this section for an affiliate shall not be considered a branch of the affiliate. C. An agency relationship between subsidiary institutions pursuant to subsection A of this section shall be on terms that are consistent with safe and sound practices and all applicable regulations of any appropriate regulatory agency.