Louisiana Civil Code Tit. I, Art. 1232. Method of declaring dispensation from collation

The declaration that the gift or legacy is made as an advantage or extra portion may be made in the instrument where such disposition is contained, or afterwards by an act passed before a notary and two witnesses, or in the donor's last will and testament. Unless expressly stated to the contrary, a declaration of dispensation from collation made in the last will and testament of the donor shall be effective as a dispensation from collating donations made both before and after execution of said testament.