Pierce County, Washington v. Guillen, Legal Guardian of Guillen, Minors

Summary

The Court held that it had jurisdiction to review the Public Disclosure Act judgment but lacked jurisdiction over the separate tort action because the latter involved only an interlocutory discovery ruling. On the merits, the Court construed 23 U.S.C. §409 to protect information collected for federal highway-safety purposes while leaving otherwise independently collected information unprotected when held by agencies not pursuing those purposes, and upheld the statute under the Commerce Clause. The Court reversed the Washington Supreme Court's judgment and remanded for further proceedings; certiorari was dismissed as to the tort action.