Okla. Stat. tit. 36, § 1703

A. All such deposits required for authority to transact insurance business in Oklahoma shall consist of cash, under negotiable and transferable certificates of deposit or other time deposit instruments issued by solvent insured banks, savings and loan associations, and trust companies in Oklahoma, or a combination of the foregoing and the securities described in Sections 1607, 1608, 1609 and 1620 of this title. B. All such deposits required pursuant to the laws of another state, province, or country, or pursuant to the retaliatory provision of Section 628 of this title, shall consist of such assets as are required or permitted by such laws, or as required pursuant to such retaliatory provision.