N.D. Cent. Code § 28-01-11 : — JUDICIAL PROCEDURE, CIVIL01 - TIME FOR COMMENCING ACTIONS —01-11 - Acts constituting adverse possession not based upon a written instrument TEXT PDF For the purpose of constituting an adverse possession by a person claiming title not founded upon a written instrument nor upon a judgment or decree, land shall be deemed to have been possessed and occupied only in the following cases: 1. When it has been protected by a substantial enclosure; or 2. When it has been usually cultivated or improved. N.D.C.C. § 28-01-11