(b) After the petition is filed, the court shall fix a date for a hearing no later than 10 days after the date the petition was filed. A copy of the petition and of the notice of the hearing, including the date fixed by the court, shall be served on
- (1) the petitioner;
- (2) the person whose commitment is sought or the person's guardian, if any;
- (3) the attorney representing the person whose commitment is sought;
- (4) the administrator in charge of the approved public or private treatment facility in which the committed person has been committed for emergency care; and
- (5) any other person the court considers appropriate.