Streets and Highways Code § 27241
CHAPTER 13. Issuance of District Bonds and Disposition of Surplus Proceeds
If the estimated amount of bonds required to pay the estimated cost and interest exceeds the total amount of bonds theretofore authorized, the board may submit to the electors of the district the proposition of authorizing additional bonds for the purpose of meeting the estimate. No error or informality in any estimate shall invalidate any bonds of the distirct.