Section 9531 Of Chapter 2. Reassessment Proceedings From California Streets And Highways Code >> Division 11.5. >> Chapter 2.

. At the hearing, no objections to the regularity of the proceedings with reference to the making of the improvements or the validity or the amount of any assessment levied in the original proceedings shall be considered. All other objections to any reassessment shall be deemed waived unless presented at the time and in the manner specified in this chapter.