La. R.S. 11:536

For the purpose of meeting disbursements for retirement allowances, annuities, and other payments there may be kept available cash, not exceeding the requirements of the system for a period of ninety days, on deposit in one or more banks or trust companies of the state organized under the laws of Louisiana or of the United States; however, the sum on deposit in any one bank or trust company shall never exceed twenty-five percent of the paid-up capital and surplus of the bank or trust company.