He permitted an eruv in Manhattan (contrary to the ruling of Rabbi Moshe Feinstein) He formulated a halakhic stance on the international dateline in Jewish law He argued against the "Lieberman clause" as a solution to the problem of agunahs – see Get (conflict) In response to the establishment of the State of Israel, he advocated the drinking of a 5th cup at the Passover Seder.[2] His request to the Chief Rabbinate that it be officially instituted was dismissed.[3]