N.D. Cent. Code § 5-01-08.1
Any person who misrepresents or misstates that person's age or the age of any other person or who misrepresents that person's age through presentation of any document purporting to show that person to be of legal age to purchase alcoholic beverages is guilty of a class B misdemeanor. Any licensee may keep a book and may require anyone who has shown documentary proof of that person's age, which substantiates that person's age to allow the purchase of alcoholic beverages, to sign the book if the age of that person is in question. The book must show the date of the purchase, the identification used in making the purchase and the appropriate numbers of such identification, the address of the purchaser, and the purchaser's signature.
N.D.C.C. § 5-01-08.1