Signing requirement

The last trailer or vehicle in any three-unit or four-unit combination must have a "LONG LOAD" sign mounted on the rear. The "LONG LOAD" sign must be a minimum twelve inches [30.48 centimeters] in height and sixty inches [152.4 centimeters] in length. The lettering must be eight inches [20.32 centimeters] in height with one-inch [2.54-centimeter] brushstrokes. The letters must be black on yellow background.