(1) If service on individuals as provided in Section 4-14 is not made on any respondent within a reasonable time or if it appears that any respondent resides outside the State, service may be made by certified mail. In such case the clerk shall mail the summons and a copy of the petition to that respondent by certified mail marked for delivery to addressee only. The court shall not proceed with the adjudicatory hearing until 5 days after such mailing. The regular return receipt for certified mail is sufficient proof of service.
     (2) If service upon individuals as provided in Section 4-14 is not made on any respondents within a reasonable time or if any person is made a respondent under the designation of “All whom it may Concern”, or if service cannot be made because the whereabouts of a respondent are unknown, service may be made by publication. The clerk of the court as soon as possible shall cause publication to be made once in a newspaper of general circulation in the county where the action is pending. Notice by publication is not required in any case when the person alleged to have legal custody of the minor has been served with summons personally or by certified mail, but the court may not enter any order or judgment against any person who cannot be served with process other than by publication unless notice by publication is given or unless that person appears. When a minor has been sheltered under Section 4-6 of this Act and summons has not been served personally or by certified mail within 20 days from the date of the order of court directing such shelter care, the clerk of the court shall cause publication. Notice by publication shall be substantially as follows:
     “A, B, C, D, (here giving the names of the named respondents, if any) and to All Whom It May Concern (if there is any respondent under that designation):
     Take notice that on (insert date) a petition was filed under the Juvenile Court Act of 1987 by …. in the circuit court of …. county entitled ‘In the interest of …., a minor’, and that in …. courtroom at …. on the …. day of …. at the hour of …., or as soon thereafter as this cause may be heard, an adjudicatory hearing will be held upon the petition to have the child declared to be a ward of the court under that Act. The court has authority in this proceeding to take from you the custody and guardianship of the minor, (and if the petition prays for the appointment of a guardian with power to consent to adoption) and to appoint a guardian with power to consent to adoption of the minor.
     Now, unless you appear at the hearing and show cause against the petition, the allegations of the petition may stand admitted as against you and each of you, and an order or judgment entered.

         Dated (insert the date of publication)”
     (3) The clerk shall also at the time of the publication of the notice send a copy thereof by mail to each of the respondents on account of whom publication is made at each respondent’s last known address. The certificate of the clerk that the clerk has mailed the notice is evidence thereof. No other publication notice is required. Every respondent notified by publication under this Section must appear and answer in open court at the hearing. The court may not proceed with the adjudicatory hearing until 10 days after service by publication on any custodial parent, guardian or legal custodian.
     (4) If it becomes necessary to change the date set for the hearing in order to comply with Section 4-14 or with this Section, notice of the resetting of the date must be given, by certified mail or other reasonable means, to each respondent who has been served with summons personally or by certified mail.