N.D. Cent. Code § 12.1-20-13: Bigamy

1.A person who marries another person, while married to another person, is guilty of a class C felony.

2.Subsection 1 does not extend to:

a.A person whose spouse has been absent for five successive years and is believed by him or her to be dead.

b.A person whose spouse has voluntarily absented himself and has continually remained without the United States for the space of five successive years.

c.A person whose former marriage has been pronounced void, null, or dissolved by the judgment of a competent court.