N.D. Cent. Code § 30.1-08-06

A written will is valid if executed in compliance with section 30.1-08-02 or if its execution complies with the law at the time of execution of the place where the will is executed, or of the law of the place where at the time of execution or at the time of death the testator is domiciled, has a place of abode, or is a national.