N.D. Cent. Code § 39-27-09: Mirror

Every motorcycle must be equipped with at least one mirror of unit magnification, securely affixed to the handlebar and capable of adjustment within a range that will reflect an image that includes at least the horizon and the road surface to the rear of the motorcycle. Such mirror must consist of a minimum reflective surface of ten square inches [64.52 square centimeters]. All mirrors shall not contain sharp edges or projections capable of producing injury.