R.I. Gen. Laws § 45-54-20: Bonds eligible for investment.

The notes and bonds of the corporation are securities in which all public officers and bodies of this state and 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, and saving 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 whatsoever who 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.