N.D. Cent. Code § 28-01.3-03: Alteration or modification of product is defense to action

No manufacturer or seller of a product may be held liable in any products liability action in which a substantial contributing cause of the injury, death, or damage to property was an alteration or modification of the product, which occurred subsequent to the sale by the manufacturer or seller to the initial user or consumer, and which changed the purpose, use, function, design, or intended use or manner of use of the product from that for which the product was originally designed, tested, or intended.