1. After a petition has been filed, unless the party or parties to be served voluntarily appear and consent to the hearing, the court shall direct the clerk to issue a notice, reciting briefly the substance of the petition and stating the date set for the hearing thereof, and requiring the person served therewith to appear before the court at the time and place if that person desires to oppose the petition.
2. The following persons must be personally served with the notice:
(a) The father or mother of the minor person, if residing within this State, and if his or her place of residence is known to the petitioner, or, if there is no parent so residing, or if the place of residence of the father or mother is not known to the petitioner, then the nearest known relative of that person, if there is any residing within the State, and if his or her residence and relationship are known to the petitioner; and
(b) The minor’s legal custodian or guardian, if residing within this State and if his or her place of residence is known to the petitioner.
3. If the petitioner or the child is receiving public assistance, the petitioner shall mail a copy of the notice of hearing and a copy of the petition to the Chief of the Child Enforcement Program of the Division of Welfare and Supportive Services of the Department of Health and Human Services by registered or certified mail return receipt requested at least 45 days before the hearing.