reduced rate average clause
1) In property insurance, a clause requiring the insured to maintain insurance at least equal to a stipulated percentage of value in order to collect partial losses in full. If the insurance is less than the minimum required, that proportion of the loss will be paid which the amount of insurance carried bears to the amount which should have been carried.
Insurance Carried x Loss
= Payment (subject to policy limit)
2) In major medical insurance, the clause which specifies the percentage of a loss that the company will pay and the percentage that the insured will bear (such as 80%20%, 75%25%).