Appellee challenged the constitutionality of Dayton Revised Code of General Ordinances 150.128(E), but failed to serve the Attorney General pursuant to R.C. 2721.12. When a statute or municipal ordinance is challenged in a declaratory judgment action, the failure to serve the Attorney General is a jurisdictional defect that can be raised at any time; therefore, because the courts below lacked jurisdiction, we vacate the judgments of the trial court and the court of appeals, and we dismiss this appeal.