Whether facial challenges to statutes authorizing warrantless searches may be brought under the Fourth Amendment.
Holding
Yes. Fourth Amendment facial challenges are neither categorically barred nor subject to a special rule of disfavor.
Reasoning
A facial challenge attacks a statute itself rather than a particular application. Although facial relief can be difficult to obtain, the Court has allowed facial challenges under many constitutional provisions, including the First, Second, and Fourth Amendments. Its precedents also include decisions invalidating warrantless-search regimes on their face, such as drug-testing programs and laws authorizing warrantless home entry or luggage searches.
The City relied on Sibron v. New York, which said that the validity of a warrantless search is often best decided in a concrete factual setting. The Court read Sibron more narrowly. Sibron involved an ambiguous and newly enacted statute with broad categories whose constitutional applications could not readily be identified. It did not establish a categorical prohibition on facial Fourth Amendment challenges.
The City also argued that the ordinance could be constitutionally applied when police had a warrant, faced exigent circumstances, or obtained consent. But those circumstances independently authorize a search; the ordinance does no work in them. In judging whether a warrantless-search law is facially valid, the relevant applications are the searches the law itself authorizes, not searches independently justified by a warrant, exigency, or consent.