Mont. Code Ann. § 33-2-204
Purpose and duration
33-2-204 . Purpose and duration. The deposit required by 33-2-202 shall be for the benefit, security, and protection of the policyholders or policyholders and creditors of the insurer in the United States. It shall be maintained as long as there is outstanding any liability of the insurer arising out of its insurance transactions in the United States.