When a county road is opened or changed, the findings of the board, the plat field notes, and the report of a licensed surveyor must be recorded in the office of the county clerk in a book kept for that purpose.
Record Of Road Opening Or Alteration To Be Maintained
Mont. Code Ann. § 7-14-2614, under Establishment, Alteration, and Abandonment of County Roads.
Mont. Code Ann. § 7-14-2614