N.D. Cent. Code § 40-22.1-13: Defects and irregularities in improvement proceedings are not fatal

If the proceedings are for a lawful purpose, unaffected by fraud, and do not violate any constitutional limitation or restriction, defects or irregularities in proceedings under this chapter do not invalidate the proceedings. 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 defects or irregularities in proceedings under this chapter, unless commenced within thirty days of the adoption of the resolution of the governing body awarding the sale of warrants to finance the improvement.