Mont. Code § 33-3-604
The maximum amount that a mutual insurer may pay to a policyholder upon dissolution, in addition to the benefits promised in the insurance policy, is the total of the premium payments made by the policyholder with interest at the legal rate compounded annually. Any excess over the amounts must be deposited with the state treasurer to the credit of the state general fund. A person may participate in the distribution of assets of a mutual insurer only if the person has a policy in effect 180 days before the insurer files its plan for dissolution with the commissioner. The amount that a person eligible to participate in the distribution of assets of a mutual insurer may receive must be in the proportion that the premiums paid by the policyholder bear to the total premiums paid to the mutual insurer by all policyholders who had policies in effect 180 days before the insurer filed its plan for dissolution with the commissioner.
§ 33-3-604, MCA