Cal. Sts. & High. Code § 25492

It is the purpose of this chapter to make the costs and expenses of all improvements made, or services rendered, and all necessary acquisitions of property or rights of way obtained, under an attempted compliance with and exercise of the powers and rights conferred by this part, payable by the property benefited or to be benefited thereby, by the issuance of bonds as provided in this chapter for the purpose of defraying the costs and expenses thereof.