For the purpose of meeting disbursements for pensions, annuities, and other payments,
there may be kept available cash, not exceeding ten (10) percent of the total amount
in the several funds of the Retirement System, on deposit in one (1) or more banks
or trust companies in the state, organized under the laws of the state, or of the
United States; provided that the sum on deposit in any one (1) bank or trust company
shall not exceed twenty-five (25) percent of the paid up capital and surplus of such
bank or trust company.