(a) If a parent, guardian, or custodian has been served by certified mail with the petition and notice of hearing and fails to appear at the preliminary hearing, the court may order that the parent, guardian, or custodian be served with a judicial summons ordering the person to appear in court with the child at a specified date and time.
(b) If, after being summoned to appear, the parent, guardian, or custodian fails to appear or fails to bring the child to court as ordered, the court may issue a pick-up order or warrant pursuant to section 5108 of this title.