Illinois constitution
Article VI
Section 6

Appeals from final judgments of a Circuit Court are a
matter of right to the Appellate Court in the Judicial
District in which the Circuit Court is located except in
cases appealable directly to the Supreme Court and except
that after a trial on the merits in a criminal case, there
shall be no appeal from a judgment of acquittal. The Supreme
Court may provide by rule for appeals to the Appellate Court
from other than final judgments of Circuit Courts. The
Appellate Court may exercise original jurisdiction when
necessary to the complete determination of any case on
review. The Appellate Court shall have such powers of direct
review of administrative action as provided by law.