La. Civ. Code art. 1520
Current with changes from the 2024 Legislative Session, Acts 3, and 6-86
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