Okla. Stat. tit. 60, § 60-1608.9: Recordkeeping and identification of trust property

A. A trustee shall keep adequate records of the administration

of the trust.

B. A trustee shall keep trust property separate from the

trustee's own property.

C. Except as otherwise provided in subsection D of this

section, a trustee shall cause the trust property to be designated

so that the interest of the trust, to the extent feasible, appears

in records maintained by a party other than a trustee or

beneficiary.

D. If the trustee maintains records clearly indicating the

respective interests, a trustee may invest as a whole the property

of two or more separate trusts.