Mont. Code Ann. § 7-14-2109
A board of county commissioners shall transfer its control over and responsibility for a county road when the department of transportation notifies it that:
History: En. Sec. 8-216, Ch. 197. L. 1965; amd. Sec. 149, Ch. 316, L. 1974; R.C.M. 1947, 32-4016; amd. Sec. 3, Ch. 512, L. 1991.