Okla. Stat. tit. 60, § 60-175.11a: Trust powers

A national banking association, a credit union, a state-

chartered corporation, including a state-chartered bank or trust

company, or a state or federal savings and loan association that has

the right to exercise trust powers and that is serving as trustee,

may:

1. Employ an affiliate or division within a financial

institution to provide brokerage, investment, administrative,

custodial, or other account services for the trust and charge the

trust for the services; and

2. Receive compensation, directly or indirectly, for the

services performed by the affiliate or division within the financial

institution, whether in the form of shared commissions, fees, or

otherwise, provided that any amount charged by the affiliate or

division for the services is disclosed and does not exceed the

customary or prevailing amount that is charged by the affiliate or

division, or a comparable entity, for comparable services rendered

to a person other than the trust.