§ 23-19.1-31 Investment of receiptspending expenditures. All moneys in the fund not immediately required for payment pursuant to theprovisions of this chapter may be invested by the state investment commission,as established by chapter 10 of title 35, pursuant to the provisions of chapter10 of title 35; provided, that the securities in which the fund is investedshall remain a part of the funds as shall other securities for which these mayfrom time to time, pursuant to the chapter, be exchanged and; provided, thatthe income from the investment shall become part of the fund, and shall be usedto the extent possible to pay debt service costs.