issued with either bond insurance or overcollateralization guaranteed by the United States Department of Education; provided all insurers maintain a triple-A rating by Standard & Poor's, Moody's, Duff & Phelps, Fitch, or any other major national securities rating agency;
provided the investments are due to mature not more than five years from the date of investment. The income derived therefrom shall be deposited in the fund or funds that the legislative body shall direct; provided that if any money invested under this section belongs to any waterworks fund, then any income derived therefrom shall be paid into and credited to the fund.
HRS § 46-50