Okla. Stat. tit. 36, § 1704

A. Upon request of the insurer, the Insurance Commissioner may designate any solvent trust company or other solvent financial institution having trust powers domiciled in this State as the Commissioner's depositary to receive and hold any such deposit. Any such deposit so held shall be at the expense of the insurer. B. The State of Oklahoma shall be responsible for the safekeeping and return of all funds and securities deposited pursuant to this Code with the Commissioner or in any depositary so designated by the Commissioner.