Any annuity, retirement allowance or benefit, or refund of contributions, or any optional benefit or any other benefit paid or payable to any person under the provisions of this Subpart is exempt from state or municipal tax, and is exempt from levy and sale, garnishment, attachment or any other process whatsoever, except as provided in R.S. 11:292, and is unassignable.
La. Consolidated Public Retirement § 11:570