Montana Title 33. Insurance and Insurance Companies § 33-15-1106. Renewal with altered terms

(1) If an insurer offers or purports to renew a policy but on less favorable terms, at a higher rate, or at a higher rating plan, the new terms, rate, or rating plan take effect on the policy renewal date only if the insurer has mailed or delivered notice of the new terms, rate, or rating plan to the insured at least 45 days before the expiration date.

(2) This section does not apply if the increase in the rate or the rating plan, or both, results from a classification change based on the altered nature or extent of the risk insured against.