N.D. Cent. Code § 28-20.3-05 (2025)
1. If recognition of a foreign-country judgment is sought as an original matter, the issue of recognition must be raised by filing an action seeking recognition of the foreign-country judgment.
2. If recognition of a foreign-country judgment is sought in a pending action, the issue of recognition may be raised by counterclaim, cross-claim, or affirmative defense.