A guardian, conservator or personal representative of an estate, who is appointed as such under the laws of this state, and who, as such guardian, conservator or personal representative, is entitled to the possession of the lands belonging to the estate which he represents, may on behalf of his ward or the estate which he represents, upon being thereunto authorized by the proper court, sign any petition or protest in this act mentioned, and may show cause, as in this act mentioned, why the boundaries of the district should not be changed or additional lands included therein.