La. Stat. tit. 9 § 2095
Although a trustee can properly make a general deposit of trust money in a bank, he shall use reasonable care in selecting the bank and properly earmark the deposit as a deposit of trust funds by him as trustee, unless the trust instrument provides otherwise.
A corporate trustee making a general deposit of trust money with an affiliate or its own banking department has a duty to a beneficiary to obtain as security for the deposit readily marketable bonds or other obligations having and maintaining a market value at least equal to the amount of the deposit, unless dispensed from doing so by specific words in the trust instrument, but such a dispensation shall not be construed as preventing a corporate trustee from putting up security for a deposit of trust money if it desires to do so. No security shall be required for any deposit up to the amount insured by the Federal Deposit Insurance Corporation.
La. R.S. § 9:2095