Mont. Code Ann. § 13-10-405

Petitions of nomination for the presidential preference primary election and the affidavits of circulation required by 13-27-302 must be presented to the election administrator of the county in which the signatures are gathered at least 1 week before the primary election filing deadline prescribed in 13-10-201 (7). The election administrator shall verify the signatures in the manner prescribed in 13-27-303 through 13-27-308 and must forward the petitions to the secretary of state by the filing deadline prescribed in 13-10-201 (7).