NY’s Highest Court Holds “Unavailability Exception” Unavailable for Pro Rata Allocation

Policyholders must pick up the tab for pollution claims in years when insurance was unavailable for those risks, the New York Court of Appeals ruled on March 27, 2018. In the closely-watched case KeySpan Gas East Corp. v. Munich Reinsurance Am., Inc., the first-impression ruling decisively decided the applicability of the “unavailability” rule in policies that mandate pro rata allocation in the context of continuous environmental contamination and other “long-tail” claims implicating many policy periods. Under standard pro-rata allocation, the
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