Iowa Code § 16.30: Bonds and notes as legal investments.

Bonds and notes of the authority are securities in which public officers, state departments and agencies, political subdivisions, insurance companies, and other persons carrying on an insurance business, banks, trust companies, savings associations, investment companies and other persons carrying on a banking business, administrators, executors, guardians, conservators, trustees and other fiduciaries, and other persons 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. The bonds and notes are also securities which may be deposited with and may be received by public officers, state departments and agencies, and political subdivisions, for any purpose for which the deposit of bonds or other obligations of this state is authorized.