N.D. Cent. Code § 57-01-19: Claim of unconstitutionality - Refund or credit of taxes paid

Notwithstanding any provision relating to claims for refund or credit of state taxes paid contained in title 57, any claim for a refund or credit of taxes paid based upon a claim that the tax or any provision thereof is unconstitutional under the federal or state constitution must be made within one hundred eighty days of the due date of the return or payment of the tax, whichever occurs first, for which the refund or credit is claimed. A claim for refund or credit of taxes paid before January 1, 2005, based upon a claim that the tax or any provision thereof is unconstitutional that is not filed with the commissioner before July 1, 2005, must be denied. This section does not apply to ad valorem property taxes.