If any special improvement assessment, special assessment, service charge, or user fee made under the provisions of this article proves invalid, the board of directors shall, by subsequent or amended acts or proceedings, promptly and without delay remedy all defects or irregularities, as the case may require, by making and providing for the collection of new special improvement assessments, special assessments, service charges, or user fees, or otherwise.L. 75: Entire section added, p. 1387, § 7, effective July 18. L. 207: Entire section amended, p. 1282, § 19, effective May 25.