Constitutional complaints to the Federal Supreme Court are not dependent on exhaustion of the cantonal instance; neither a constitutional norm nor a statutory provision imposes such a prerequisite. A final constitutional judgment is res judicata and may be revised only at the request of the parties to the original proceedings; cantonal courts or higher cantonal authorities lack standing to seek revision, even if they contest the federal court’s view of competence. While such authorities may state their position during the pendency of a state-law complaint, they cannot reopen a final federal constitutional decision (consid. 1-2).
Das Bundesgericht zieht in Erwägung: