Disputed questions of law are reviewed de novo. People ex rel. 227 Ill. App. We agree with the trial court's judgment that res judicata does not apply to this case. Plaintiffs argue that the trial court correctly found that an intervening change in law renders res judicata inapplicable to this case.
Defendant urges that plaintiffs' argument is unsupported by Illinois law.
We hold that it does. 16 Ill. App. In City of Des Plaines, a municipality sought to enforce certain zoning restrictions in 1966 against a sanitary district. The case eventually reached our supreme court, which held that the sanitary district was not subject to the municipality's zoning ordinance. In 1972, the municipality filed a similar complaint in the circuit court, seeking a declaratory judgment that the municipality may regulate the sanitary district's land use activities pursuant to the 1970 Illinois Constitution.