anti-concurrent cause provision (ACC)
An anti-concurrent cause (ACC) provision is a term in a first-party policy that indicates that a loss caused by a combination of covered and excluded causes of losses will not be covered.
Additional Information
An ACC provision applies in either sequential-cause situations, where the first event sets in motion a chain of events that causes a second event that causes the loss, or concurrent-cause situations, where two or more causes of loss happen simultaneously to produce the same injury or damage. If any cause of loss falls within the terms of a policy exclusion that is accompanied by ACC language, the loss will be excluded, regardless of whether another unexcluded cause of loss qualifies as the "proximate cause" under the jurisdiction's common law rules.
