La. R.S. 11:155

Notwithstanding any other provisions of law to the contrary and specifically the laws governing all public, state, municipal, or parochial retirement systems, allowing "optional allowances", no member, retiree, beneficiary, or survivor shall be entitled to receive his benefit in a lump sum, or actuarial equivalent lump sum, or a lump sum of equivalent actuarial value and shall only receive his benefit in equal monthly benefits payable throughout life or the legally allowed time if a shorter time is specified by the laws governing the specific retirement system, except as provided in R.S. 11:446, 783, 1150, or 1307. This Section shall not apply to the return of accumulated contributions without interest if a person terminates employment and requests such a refund under the laws applicable to the systems.