(1) A flag vehicle may be any passenger car or two-axle truck a minimum of 60 inches wide. The maximum manufacturer's rating for the flag vehicle shall not exceed a gross vehicle weight rating of 14,000 pounds. Service or mechanic trucks owned or contracted by the permittee and used as a flag vehicle shall not exceed a gross vehicle weight rating of 26,001 pounds. A flag vehicle may not exceed legal limits of size and weight. Trucks used as flag vehicles shall be clearly distinguished from and identifiable as the escort vehicle. A flag vehicle may pull a trailer or carry any item or equipment which:
(a) is within legal limits of size and weight;
(b) allows an unobstructed view of the flashing lights and signs used by the flag vehicle;
(c) complies with all state traffic laws; and
(d) possesses current registration and valid insurance.
(2) Service or mechanic trucks used as a flag vehicle must not have a utility box which extends above the cab more than 12 inches or beyond the width of the cab more than 6 inches on either side.
(3) A sign with the words "oversize load" or similar wording shall be visible from the front of the vehicle and rear of the vehicle at all times when piloting an oversize load. Letters shall not be less than 8 inches in height. The letters shall be dark in color on a light colored background. When not being operated as a flag vehicle, signs must be removed.
(4) Flashing amber lights, visible 360 degrees, shall be mounted at each end of a sign with the words "oversize load" or similar wording, on the roof of the flag vehicle. A revolving or strobe light may be substituted for flashing lights. Lights shall be flashing at all times when piloting an oversize load.
(5) All flag vehicles shall be equipped with two-way communication.
(6) Flag vehicles must remain within 1,000 feet of the permitted vehicle or load.