Minn. Stat. § 524.2-123: INSTRUMENTS REFERENCING INTESTACY LAWS.

If a maker has executed a will or other instrument before January 1, 1996, which directs disposition of all or part of the estate pursuant to the intestacy laws of the state of Minnesota, the laws to be applied shall be in accordance with the laws of intestate succession in effect on the date of the will or other instrument, unless the will or instrument directs otherwise.