Montana Title 33. Insurance and Insurance Companies § 33-15-1108. Limitation on midterm premium increases

(1) In any case involving property or casualty insurance that is subject to this part, the insurer may not unilaterally increase the rate charged or decrease the coverage provided for the contract period unless:

(2) This section does not prohibit the cancellation of a policy for any other reason permitted by the policy or by law during an initial policy period not to exceed 60 days.