No person may act as personal fiduciary who is a minor or person with a disability , who has been convicted of a felony or whose interests conflict with the ward's interests in the decedent's estate. A personal fiduciary designated under subparagraph (3) above shall be a spouse, descendant, parent, grandparent, brother, sister, uncle or aunt of the ward, a guardian of the person of the ward or a party having an interest in the estate substantially identical to that of the ward. The responsibility of a personal fiduciary begins on delivery of his written acceptance of the office to the independent representative. Any personal fiduciary may refuse to act or may resign at any time by instrument delivered to the independent representative. When a personal fiduciary has been appointed and there is a change of personal fiduciary or a vacancy in that office, the independent representative shall inform the court; and the court may designate any suitable person as personal fiduciary when there is a vacancy that has not been filled by the independent representative in accordance with this Section 28-3.
755 ILCS 5/28-3