Estates in real property in respect to the duration of their enjoyment are: 1. Estates of inheritance or perpetual estates; 2. Estates for life; 3. Estates for years; or 4. Estates at will.
Classification of estates as to duration
N.D.C.C. § 47-04-02 — under Estates in Real Property.
N.D.C.C. § 47-04-02