Cal. Sts. & High. Code § 35402

The legislative body may by ordinance, resolution, or indenture provide for the issuance of bonds of the district in an amount not exceeding the amount estimated to be necessary to make the proposed acquisitions and improvements, to pay the incidental expenses in connection therewith and the proceedings therefor and to establish a reserve fund for the payment of the principal of and interest on the bonds, and for working capital and interest during the period of construction and for a period of not to exceed six (6) months thereafter, less any amount to be contributed by the city for such purposes.