Mont. Code Ann. § 7-4-2111

The board of county commissioners may pay a proper charge to any insurance company authorized to do business in this state or to a self-insurance pool insuring counties as authorized by 2-9-211 for insurance providing indemnity for or protection to any county officer against liability for the loss, without fault, connivance, or neglect on the officer's part, of money, securities, or other property for which the officer is accountable to the county.