(1) Unless otherwise specified in statute or this chapter, flag vehicles are required for vehicles operating under special permit if one or more of the following conditions apply:

(a) when traveling on interstate highways:

(i) width over 16.5 feet, one rear flag vehicle;

(ii) length over 120 feet, one rear flag vehicle;

(b) when traveling on noninterstate highways:

(i) width over 12.5 feet, to and including 16.5 feet, one front flag vehicle;

(ii) width over 16.5 feet, one front and one rear flag vehicle;

(iii) length over 110 feet, one rear flag vehicle.

(2) A rear flag vehicle escort is not required for a vehicle that exceeds 12 feet 6 inches in width, that is hauling or towing an implement of husbandry, construction equipment, or forestry equipment, and that is operating under 61-10-102 (5), MCA, or as authorized by special permit if the vehicle is operating at highway speed or with the flow of traffic.

(3) A vehicle or load not equipped as required in ARM 18.8.510B must use one front and one rear flag vehicle for all travel.

(4) If a vehicle or load is not required to have a flag vehicle for interstate travel, and the permitted load is not subject to ARM 18.8.602, no flag vehicle is required for a radius of two miles of an interstate interchange.