La. Stat. tit. 38 § 1644
The death, interdiction, or ceasing to be owner, of any landowner who has signed any petition required to be signed by a majority of the landowners in connection with the creation, organization or administration of a drainage district or of any landowner required to be notified only by published notice, shall in no manner affect any proceedings had, begun, or taken under the provisions of this Part. The death, interdiction, or ceasing to be owner of any party to any proceeding required to be served with citation or who has filed contest in any proceeding required to be filed in suit in the district court shall not abate any proceeding, but upon suggestion the court shall order the legal representative of the party to be made party to the proceedings and served with a copy of the order not less than five days prior to any hearing of the proceeding. If the legal representatives be absentees or unknown, then the court shall appoint an attorney at law as curator ad hoc to represent them, and he shall be served as provided in this Section. The matter shall then proceed in all respects as in case of the original parties being in court.
La. R.S. § 38:1644