La. Civ. Code art. 1406
Current with operative changes from the 2024 Third Special Legislative Session
In order that the purchaser be not liable to this action, it is besides necessary that the vendor should have ceded to him all his successive rights, that is, all the rights he had in the succession. If he has only sold his part in the immovables to be divided, this sale shall be subject to rescission for lesion beyond a fourth.
La. C.C. § 1406