Cal. Pub. Util. Code § 16811

When the cost of any public utility works named in a petition can be paid out of the revenues of the district derived from the operation of its public utilities, in addition to the other necessary expenses of the district, each proposition therefor submitted to the electors shall specify the cost of the public utility works proposed for acquisition by the district, the proposed method and manner of its payment, and the question whether the utility works shall be acquired upon such terms.