An affidavit executed by a person who is the owner of the plot by virtue of the laws of intestate succession or by his or her attorney-in-fact, setting forth the fact of the death of the owner, the absence of a disposition of the plot by the owner in his or her will by a specific devise, the name of the person or persons who have rights to the plot under the intestate succession laws of the state, and the consent of that person or those persons to the sale of the plot by the cemetery authority, shall constitute complete authorization to the cemetery authority to permit any sale of the unoccupied portions of the plot.