La. Stat. tit. 9 § 1809
Current with operative changes from the 2024 Third Special Legislative Session
When a testamentary trust designates as principal beneficiary a person who is a descendant, a sibling, or a descendant of a sibling of the settlor, and that person does not survive the settlor, the descendants by roots of that person will be principal beneficiaries in his place, unless the trust instrument provides otherwise.
La. R.S. § 9:1809