The Hawaii Supreme Court addressed four certified questions regarding "other insurance" clauses in commercial general liability policies. For the first question, the court found that an insurer cannot disclaim its duty to defend based solely on another insurer's policy, but may do so if its own policy explicitly references the other policy. For the second question, the court ruled that an excess clause can release an insurer's defense duty between insurers. For the third question, the court determined that a court should first assess the relevance of policies' excess clauses before analyzing irreconcilability. Finally, for the fourth question, the court concluded that a primary insurer cannot avoid its defense duty by arguing it is excess based on another policy's clause.