The provisions of 33-20-132 through 33-20-135 do not apply to any insurance contract issued before October 1, 1985, unless the policyholder agrees in writing to the applicability of such provisions.
Variable Interest Rates -- Applicability To Policies Issued Before October 1985
Mont. Code Ann. § 33-20-136, under Policy Provisions.
Mont. Code Ann. § 33-20-136