La. Civ. Code art. 891
Current with changes from the 2024 First and Second Extraordinary Sessions
If the deceased leaves no descendants but is survived by a father, mother, or both, and by a brother or sister, or both, or descendants from them, the brothers and sisters or their descendants succeed to the separate property of the deceased subject to a usufruct in favor of the surviving parent or parents. If both parents survive the deceased, the usufruct shall be joint and successive.
La. C.C. § 891