Cal. Water Code § 51380

When an assessment levied for reclamation purposes is adjudged invalid by a court of competent jurisdiction, or is adjudged invalid as to any parcel, or any parcel is not charged with the assessment, a new assessment may be levied to raise the amount for which the invalid assessment was levied and any further sum then required, or a subsequent reassessment of the parcels may be made separately for the purpose of charging each parcel with its proper proportion of the reclamation costs.