Mont. Code Ann. § 25-10-405

The state, a county, a municipality, or any subdivision thereof or any officer when prosecuting or defending an action on behalf of the state, a county, a municipality, or a subdivision thereof is not required to pay or deposit any fee or amount to or with any officer during the prosecution or defense of an action, except the fee under 25-1-201 (1)(p) for filing a motion for substitution of a judge, the fee under 25-1-201 (1)(r) for filing a pleading by facsimile or e-mail, and all fees for photocopies, postage and handling, certifications, authentications, and record searches.