The supreme court may prescribe rules of pleading, practice, and procedure and the forms of process, writs, and notices under section 602.4201, for all commitment proceedings in a court of this state under this chapter. The rules shall be drawn for the purpose of simplifying and expediting the proceedings, so far as is consistent with the rights of the parties involved. The rules shall not abridge, enlarge, or modify the substantive rights of a party to a commitment proceeding under this chapter.