Okla. Admin. Code § 590:35-19-4
The rights of the Participant under this Plan shall not be subject to the rights of creditors of the Participant or any Beneficiary, and shall be exempt from execution, attachment, prior assignment or any other judicial relief or order for creditors or other third persons, except as to federal tax levies and judgments resulting from unpaid tax assessment, and to payments actually paid to the Participant or his Beneficiary and as provided in Chapter 30 of these Rules. It is agreed that neither the Participant nor his Beneficiary nor any other designee shall have any right to commute, sell, assign, pledge, encumber, transfer, or otherwise convey the right to receive any payments hereunder which payments and right hereto are expressly declared to be nonassignable and nontransferable, except as provided in Chapter 30 of these Rules.
Okla. Admin. Code § 590:35-19-4