A person is not eligible to serve in the office of county auditor of any county unless the person is of voting age and has been a resident of the county for which the person is elected or appointed for at least 2 years preceding election or appointment.
Qualifications Of County Auditor
Mont. Code Ann. § 7-6-2403, under County Auditor and Claims Against County.
Mont. Code Ann. § 7-6-2403