Cal. Sts. & High. Code § 5553

The street superintendent shall thereupon prepare a reassessment after deducting such apportionment rebate and return the same to the legislative body. The reassessment need not be in any prescribed form but shall refer to the original assessment filed, giving the date of filing of the original assessment, and shall state that it was made pursuant to the order of the legislative body and shall be accompanied by a diagram showing the lots to be reassessed and their relation to the work. Such diagram may be the original assessment diagram if it otherwise conforms to the provisions of this chapter.