US lawNorth DakotaRegulationsTitle 37 โ Department of TransportationArticle 37-11 โ Tourist-Oriented Directional SignsChapter 37-11-05 โ Design and Composition37-11-05-02NDAC 37-11-05-02Sign face backingLast amended: 1994Year: 2026Length: 30 wordsOfficial source Cite as N.D. Admin. Code ยง 37-11-05-02The sign backing material must be one piece of flat sheet aluminum seventy-two inches [1.83 meters] by sixteen inches [406.4 millimeters] with a minimum thickness of 0.125 inches [3.18 millimeters].PreviousNDAC 37-11-05-01NextNDAC 37-11-05-03