Unless you annulled the decree the last orders still stand. You will need to reopen the case and begin litigation.

Neither a 17 yo or 15 yo is an adult. . .

File the appropriate motion for his contemptuous acts.

You can file for child support. Paternity will need to be established if it isn't already. You can't make him be a good father and most states...

Your son has no legal monetary responsibility to provide child support until paternity is established.

You need facts, not rumors of a change in circumstances to modify.

Call CDPH back since they know what they want. It may not even be a form.

You could since there are no court orders, but you can bet he will file for divorce immediately and go for custody of your daughter. Get a...

You can get your court file, but not likely to get the County Atty file, as that contains privileged information about the other party.

Most states have relocation laws. Contact an attorney.