Chief Rabbi of the Syrian Jewish community
Rabbi Yaakov Kassin and the Rabbinic Proclamation Concerning Eruvin in New York
Rabbi Yaakov Kassin served as Chief Rabbi of New York's Syrian Jewish community. His name is printed on the Kislev 5739 proclamation applying the earlier Manhattan prohibition to New York and other large cities.
A warning addressed to the whole city
The proclamation does not treat the proposed Brooklyn eruv as the concern of one shul or neighborhood. It says that the halachic ruling reached for Manhattan applies to every large city where the same public-domain conditions exist.
Rabbi Kassin's name appears with leading Ashkenazic, Sephardic, Chassidic, and other Rabbonim. The breadth of the list reflects the public conduct at stake: once an eruv is announced, families from many communities may carry on its strength.
The Syrian community and the New York question
Rabbi Kassin carried responsibility for one of New York's major Torah communities. His inclusion joins its rabbinic leadership to a ruling framed around the metropolis rather than around the communal identity of a particular neighborhood.
The proclamation supplies that New York-wide background for Crown Heights. The local Beis Din later gave the direct neighborhood psak prohibiting reliance on the publicized route.
How his name appears
The available proclamation shows Rabbi Kassin's name in the printed list. It does not display a separate handwritten autograph for him. The page is used for the collective ruling in the form in which it survives, without turning the typeset line into a claim about a missing signature sheet.