North Dakota

Amendment

"Marriage consists only of the legal union between a man and a woman. No other domestic union, however denominated, may be recognized as a marriage or given the same or substantially equivalent legal effect."
North Dakota Constitution, Article XI, Section 28.

Statutes

Marriage Protection Act (1997)

What constitutes marriage -- Spouse defined.
Marriage is a personal relation arising out of a civil contract between one man and one woman to which the consent of the parties is essential. The marriage relation may be entered into, maintained, annulled, or dissolved only as provided by law. A spouse refers only to a person of the opposite sex who is a husband or a wife.
N.D. Cent. Code § 14-03-01

Websites

Government Website
North Dakota Family Alliance