Recently, the New York Court of Appeals was asked once again to determine the obligation of an insurer to defend and indemnify an additional insured for potential liability arising out of the operations of the primary insured.1 In the past several years the Court has addressed this issue, and others, in the well known cases of Pecker Iron Works,2 BP Air3 and Worth Construction.4

In BP, the Court offered a liberal interpretation of the obligations of an additional insured carrier and also put a related issue raised by Pecker to rest. A year later, in the Worth case, the Court placed restrictions on BP‘s reach. Now, in Regal, the Court provides a refresher on what triggers additional insurance coverage.