Any application or document filed with the Court must be served on all the parties to the proceedings, including the Independent Children’s Lawyer, if appointed, unless a court order says otherwise.
Documents must be served as soon as practicable after filing, and at least seven days prior to the hearing of the application or at least three days prior to the hearing of an interlocutory application.
Proof of this service must then be filed with the Court.
For a step-by-step guide see How do I serve family law documents?.
If you are serving a divorce application see How do I serve a divorce?