Okla. Stat. tit. 74 § 5063.19
The bonds issued pursuant to this act are hereby made securities in which all public officers and bodies of this state, all municipalities and municipal subdivisions, all insurance companies and associations and other persons carrying on an insurance business, all banks, bankers, trust companies, savings banks, savings associations, including savings and loan associations and building and loan associations, investment companies and other persons carrying on a banking business, all administrators, guardians, executors, trustees and other fiduciaries, and all other persons whatsoever who are now or who may hereafter be authorized to invest in bonds or other obligations of this state may properly and legally invest funds including capital in their control or belonging to them. Notwithstanding any other provision of law, said bonds are also hereby made securities which may be deposited with and may be received by all public officers and bodies of this state and all municipalities and municipal subdivisions for any purpose for which the deposit of bonds or other obligations of this state are now or may hereafter be authorized.
Okla. Stat. tit. 74, § 5063.19