Rule 15.05.01 - JURISDICTION AND VENUE(a) The proceedings shall be had in the county where the petitioner or the respondent resides, except as otherwise provided herein. The parties, other than the Illinois Department of Healthcare and Family Services, must sign an Affidavit of Venue to confirm that venue in DuPage County is proper.(b) If neither of the parties resides in DuPage County, either or both of the parties must file a written motion advising the Court that the forum selected is not one of proper venue and seeking an appropriate order from the Court allowing a waiver of the venue requirements of Section 5/104 of the IMDMA. The waiver of venue motion must be filed before any other pleadings and shall be filed along with the original petition for dissolution of marriage.Ill. R. Cir. Ct. Dupage Cnty. 15.05.01