La. Civ. Code art. 1520
Current with operative changes from the 2024 Third Special Legislative Session
A disposition that is not in trust by which a thing is donated in full ownership to a first donee, called the institute, with a charge to preserve the thing and deliver it to a second donee, called the substitute, at the death of the institute, is null with regard to both the institute and the substitute.
La. C.C. § 1520