Background
Melvin Cox Jr. and Dyani Cox divorced in Cook County, and the dissolution judgment included child support obligations for their three minor children. Both parties and the children subsequently moved out of Illinois — petitioner relocated to Georgia. In 2024, respondent filed a motion in the Cook County circuit court seeking to hold petitioner in contempt for child support arrears and to modify the support obligation.
Petitioner challenged the Illinois court’s authority to rule on the motions, arguing that because no party remained in Illinois, the court lacked jurisdiction to enforce or modify the existing child support order. The circuit court found it retained jurisdiction, ruled on the contempt motion, modified child support based on changed circumstances, and applied the statutory guidelines based on the parties’ current incomes.
The Court’s Holding
The First District affirmed on rehearing, withdrawing its prior decision. The court held that the circuit court retained authority to rule on respondent’s petition for rule to show cause and motion to modify child support. Under the Uniform Interstate Family Support Act (UIFSA), an Illinois court that issued the initial child support order retains continuing exclusive jurisdiction to modify that order as long as the order remains in effect, regardless of where the parties subsequently reside — unless all parties and the children have left the state and the parties consent to another state’s jurisdiction or register the order in another state.
The court also found no error in the circuit court’s child support calculations, which applied statutory guidelines based on the parties’ current incomes and found a substantial change of circumstances warranting modification.
Key Takeaways
- Under UIFSA, an Illinois court retains continuing exclusive jurisdiction over child support orders it issued, even after all parties leave the state, until the parties affirmatively consent to another state’s jurisdiction or register the order elsewhere.
- A substantial change in circumstances — including changes in parental income — supports modification of child support obligations under Illinois guidelines.
- Illinois courts need not make detailed findings beyond identifying current incomes and the guideline amount when applying the standard child support formula without deviation.
Why It Matters
This opinion addresses an increasingly common scenario as families become more mobile: which state’s court retains jurisdiction over child support when all parties have relocated. The decision provides clarity that Illinois courts will continue to enforce and modify their own orders under UIFSA, which prevents obligors from evading enforcement simply by leaving the state. Family law practitioners should note that jurisdiction does not automatically transfer upon relocation — affirmative steps are required to establish another state’s authority.