Rabbi Shmuel Wosner on the Authority of Local Rabbonim in Eruv Questions

A public eruv is a local psak

An eruv gives an entire community permission to carry. Its halachic status depends on local streets, walls, openings, ownership, and legal arrangements, as well as a reliable system of inspection and repair. For that reason, it belongs to the authority of the Rabbonim who are responsible for the place.

Rabbi Wosner is cited for this principle in the Crown Heights discussion. A distant opinion about a description of the route cannot replace the decision of the mara d'asra who must know the facts and answer for the public result.

Authority includes continuing responsibility

The question does not end when poles and wires are first installed. Construction changes, utility work, storms, broken lines, road alterations, and questions about the communal arrangements can affect the eruv after it has been announced.

The Rabbonim who authorize a public eruv must therefore control its halachic design and its continuing supervision. Publicity without that responsibility leaves families relying on a structure whose status they cannot determine for themselves.

The application in Crown Heights

The Crown Heights Beis Din applied this principle directly in its Sivan 5776 letters. A neighborhood-wide eruv could not be established privately against the decision of the Rabbonim entrusted with Crown Heights.

The physical objections and the question of authority lead to the same practical psak: the publicized eruv may not be relied upon, and carrying remains prohibited.