Subject to the provisions of 30-9A-501, while farm products are located in a jurisdiction, the local law of that jurisdiction governs perfection, the effect of perfection or nonperfection, and the priority of an agricultural lien on the farm products.
Law Governing Perfection And Priority Of Agricultural Liens
Mont. Code Ann. § 30-9A-302, under Perfection and Priority.
Mont. Code Ann. § 30-9A-302