Cal. Water Code § 35520.18

If more than one-third of the votes cast are for “Benefit Assessment Bonds - No,” the board shall, by resolution, abandon the project, make a call upon the assessment roll, certified as provided for by Section 35520.11 or as finally fixed as provided for by Section 35520.14, sufficient to pay all costs and expenses incurred in preparation of the plan of works and estimate of cost provided for by Section 35520.2, in the preparation of the assessment roll and report provided for by Sections 35520.7 and 35520.8, in noticing and holding the hearing required by Section 35520.10, and in calling, noticing, and holding the election provided for by Section 35520.15 and, thereafter, cancel all the assessment remaining uncalled.