A co-insurance economy measure whereby the full specification of the property insured is set out in, or attached to, the policy of the leading insurer only. The policies of the co-insurers are worded to cover the relevant proportions of the property as set out in the leading company’s policy or specification.
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Where, in fire insurance, co-insurers issue separate policies the full specifications may be included only in the policy of the leading insurer, other policies containing an outline only, as a measure of economy.