Residential placement.) No guardian appointed under this Article, except for duly appointed Public Guardians and the Office of State Guardian, shall have the power, unless specified by court order, to place his ward in a residential facility. The guardianship order may specify the conditions on which the guardian may admit the ward to a residential facility without further court order. In making residential placement decisions, the guardian shall make decisions in conformity with the preferences of the ward unless the guardian is reasonably certain that the decisions will result in substantial harm to the ward or to the ward’s estate. When the preferences of the ward cannot be ascertained or where they will result in substantial harm to the ward or to the ward’s estate, the guardian shall make decisions with respect to the ward’s placement which are in the best interests of the ward. The guardian shall not remove the ward from his or her home or separate the ward from family and friends unless such removal is necessary to prevent substantial harm to the ward or to the ward’s estate. The guardian shall have a duty to investigate the availability of reasonable residential alternatives. The guardian shall monitor the placement of the ward on an on-going basis to ensure its continued appropriateness, and shall pursue appropriate alternatives as needed.