Div will probably come in and post something.

If he applies, he pays, gets a court date, then he gets you served with the papers. From memory with kids you have to appear (Div can clarify).
If you both apply, you can decide to share the cost or he pays, you both sign & you get a court date.
If you apply, if you're on a health card I think it is free or reduced, you get a court date, you get him served with the papers.