Defining "serious crime" to provide that a register of wills or court may not grant letters of administration to a person convicted of a crime that reflects adversely on an individual's honesty, trustworthiness, or fitness to perform the duties of a personal representative; providing an exception; prohibiting a court, unless good cause is shown, from appointing, as a guardian of the person of a minor or disabled person, a person who has been convicted of a specified crime; etc.