N.D. Cent. Code § 43-19.1-21
Each registrant under this chapter upon registration may obtain a seal of the design authorized by the board, bearing the registrant's name, registration number, and the legend "registered professional engineer" or "registered professional land surveyor". Final engineering drawings, specifications, maps, plats, reports, or other documents prepared by a person required to be registered under this chapter, when presented to a client, contractor, subconsultant, or any public agency, must be signed, dated, and stamped with the seal or facsimile of the seal. A working drawing or unfinished document must contain a statement to the effect the drawing or document is preliminary and not for construction, recording purposes, or implementation. It is unlawful for a registrant to affix or permit the registrant's seal and signature or facsimiles thereof to be affixed to any engineering drawings, specifications, maps, plats, reports, or other documents after the expiration or revocation or during the suspension of a certificate, or for the purpose of aiding and abetting any other person to evade or attempt to evade any provision of this chapter.
N.D.C.C. § 43-19.1-21