N.D. Cent. Code § 35-24-21
35-24-21. Waivers
35-24-21. Waivers
The taking of any note or any additional security by any person given a lien by this chapter
does not constitute a waiver of the lien unless made a waiver by express agreement of the
parties in writing. The claiming of a lien under this chapter does not constitute a waiver of any
other right or security held by the claimant unless made a waiver by express agreement of the
parties in writing.