Upon filing of the petition the court shall make an order fixing a day for hearing on such petition which shall be not less than 25 days thereafter. The order shall recite the purpose of the petition and the description of the property to be taken and the names of the persons mentioned in the petition as parties interested therein. It shall order the persons to appear before the court at the time fixed therein for the hearing and show cause, if any they have, why the prayer in the petition should not be granted. If any person named in such petition shall be a minor or an insane or incompetent person who has no general guardian, then the court shall appoint a guardian ad litem for him.
MCL 123.774