N.D. Cent. Code § 39-06-19.1
A valid operator's license issued under this chapter to a resident of this state who enters or is in the United States armed forces and serving on active duty continues in full force and effect so long as the active service continues and the licensee remains absent from this state, and for not to exceed thirty days following the date on which the holder of this license is honorably separated from this service or returns to this state, unless the license is sooner suspended, canceled, or revoked for cause. The license is valid only if in the immediate possession of the licensee while driving and the licensee has the licensee's discharge or separation papers, if the licensee has been discharged or separated from the service, or has documentation authorizing the licensee to be absent from the licensee's duty station in the licensee's immediate possession.
N.D.C.C. § 39-06-19.1