Within 60 days after the evidentiary hearing, the petitioner may file any brief and if so directed by the court shall file proposed findings of fact and conclusions of law and a proposed order. Within 90 days after the evidentiary hearing, the respondent may file any responsive brief and if so directed by the court shall file proposed findings of fact and conclusions of law and a proposed order. Within 100 days after the evidentiary hearing, the petitioner may file any additional responsive brief.