N.D. Cent. Code § 61-35-71: Defects and irregularities in improvement proceedings are not fatal

Defects and irregularities in any proceedings had or to be had under this chapter relating to district improvements by the special assessment method, if the proceedings are for a lawful purpose and are unaffected by fraud and do not violate any constitutional limitation or restriction, do not invalidate the proceedings, and no action may be commenced or maintained and no defense or counterclaim in any action may be recognized in the courts of this state founded on any such defects or irregularities in the proceedings, unless commenced within thirty days of the adoption of the resolution of the board awarding the sale of bonds to finance the improvement.