(1) Vehicles operating under special permit conditions which require the use of flag vehicles may be moved in a convoy under the following conditions:

(a) maximum width is 16.5 feet;

(b) maximum vehicle length is 120 feet;

(c) a convoy may not exceed five vehicles or vehicle combinations operating under special permit;

(d) there shall be a minimum of 500 feet and a maximum of 1000 feet between all vehicles in a convoy;

(e) one properly equipped flag vehicle is required at the front and rear of the convoy. In addition to the equipment required in ARM 18.8.510A, each escort vehicle shall be equipped with a sign stating "Oversize Load Convoy;"

(f) loads operating under ARM 18.8.602 conditions are required to have a properly equipped flag person as specified in ARM 18.8.602 in each escort vehicle.