Cal. Gov. Code § 63030

Bonds issued by the bank or a special purpose trust are legal investments for all trust funds, the funds of all insurance companies, banks, both commercial and savings, trust companies, executors, administrators, trustees, and other fiduciaries, for state school funds, pension funds, and for any funds that may be invested in county, school, or municipal bonds. These bonds are securities that may legally be deposited with, and received by, any state or municipal officer or agency or political subdivision of the state for any purpose for which the deposit of bonds or obligations of the state is now, or may hereafter be, authorized by law, including, deposits to secure public funds.