Mont. Code Ann. § 33-2-610

No judgment creditor or other claimant of an insurer shall have the right to levy upon any of the assets or securities held in this state as a deposit for the protection of the insurer's policyholders or policyholders and creditors. As to deposits pursuant to the retaliatory law, 33-2-709, levy thereupon shall be permitted if so provided in the commissioner's order under which the deposit is made.