Illinois Pro SE Instructions Rule 8.03-Marriage, is a set of rules established by the Illinois Supreme Court to provide guidance to individuals who are representing themselves in a marriage-related court action in the state of Illinois. The Rule applies to all marriage-related actions, such as dissolution of marriage (divorce), legal separation, annulment, declaration of invalidity of marriage, and any other actions related to the marital relationship. The Rule provides detailed instructions on how to prepare for court proceedings, what documents must be filed, how to serve those documents on the other party, and how to proceed with the case. The Rule also includes instructions for filing a counterclaim or cross-claim if the other party files a complaint against you. The Rule is divided into three sections: (1) Pre-Filing Requirements, (2) Filing the Petition, and (3) Post-Filing Requirements.