An administrative law judge shall vacate a calendared hearing and return the matter to the agency for further action, if :

1. The parties agree to vacate the hearing;
2. The agency dismisses the matter;
3. The non-agency party withdraws the appeal; or
4. Facts demonstrate to the administrative law judge that it is appropriate to vacate the hearing for the purpose of informal disposition, or if the action will further administrative convenience, expedition and economy and does not conflict with law or cause undue prejudice to any party.