Cal. Water Code § 23913

Bonds of the district for the improvement district shall be issued and sold in substantially the same manner and upon the same terms and conditions as general obligation bonds of the entire district, except that assessments for the payment of the bonds and the interest thereon shall be levied and collected from annual assessments to be levied upon and collected from lands within the improvement district. The bonds shall be issued in the name of the district and shall be designated “Bonds of ________ District for Improvement District No. ___” and each bond and all interest coupons shall state that the assessment for the payment thereof shall be limited to annual assessments to be levied upon and collected from the lands within the improvement district, except to the extent that provision for such payment has been made by the board, as may be permitted by law.