Ariz. Rev. Stat. § 40-1137
Bonds issued under the provisions of this article are made securities in which all public officers and bodies of the state and all municipalities and political subdivisions of this state, all insurance companies and associations and other persons carrying on an insurance business, all banks, bankers, trust companies, savings banks and savings associations, including savings and loan associations, 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 whomever are now or may hereafter be authorized to invest in bonds or other obligations of the state, may properly and legally invest funds including capital in their control or belonging to them. The bonds are also made securities which may be deposited with and may be received by all public officers and bodies of the state and all municipalities and political subdivisions of this state for any purpose for which the deposit of bonds or other obligations of the state is now or may hereafter be authorized.
A.R.S. § 40-1137