A ____________ places the occurrence of the loss in one policy period even if the occurrence of the damage spanned a larger period of time.

A deemer clause, also known as a deeming provision or batch clause, is a contractual term within an insurance policy. Its function is to group multiple related claims, losses, or occurrences that may span a significant period into a single event for coverage purposes. The clause "deems" all related damages to have occurred at a specific point in time, typically the date of the first individual loss or claim. This effectively places the entire loss within a single policy period, which clarifies which policy responds and limits the insurer's liability to a single set of policy limits.

A. event occurrence: This describes a type of policy trigger (an event happening during the policy period), not a specific clause that consolidates long-term losses.

C. manifestation: This is a legal theory that determines when coverage is triggered (i.e., when damage becomes apparent), not the policy clause that contractually groups losses.

D. double trigger: This theory expands coverage across multiple policy periods (e.g., at exposure and manifestation), which is the opposite of consolidating a loss into one period.

1. Sclafane, S. (2004). "Defining an 'Occurrence' in Asbestos Claims." National Underwriter / Property & Casualty, 108(15), 10-11. This article discusses the legal and contractual challenges of defining an "occurrence" for long-tail claims, explaining how policy language, including deemer or batching clauses, is used to treat multiple claims as a single occurrence to limit exposure to one policy period.

2. Stempel, J. W. (2013). Stempel and Knutsen on Insurance Coverage, Fourth Edition. Wolters Kluwer Law & Business. In Section § 11.03[C], "Number of Occurrences," the treatise explains that deemer clauses are used by insurers to contractually define related harmful events as a single occurrence, thereby fixing the loss in time to a single policy.

3. Abraham, K. S. (2017). Insurance Law and Regulation, Sixth Edition. Foundation Press. In Chapter 4, "The Insurance Contract," the text discusses the interpretation of policy terms like "occurrence" and the function of specific clauses designed to manage liability for mass torts and long-tail claims, including provisions that deem a series of events to be a single occurrence.