Mont. Code Ann. § 7-22-2513

A governing body may make necessary expenditures from the county vertebrate pest management fund for equipment, materials, supplies, personal services, and other expenses. A governing body may also purchase vertebrate pest management supplies and equipment for use by cooperating governmental agencies, counties, rodent control districts, associations, corporations, or individuals in the management of vertebrate pests if the governing body charges such users the approximate cost of the supplies and equipment. Receipts from the resale of such supplies and equipment to the cooperating users must be credited to the county vertebrate pest management fund.