Cal. Government Code § 50665.13

The bonds shall bear interest at a rate or rates not exceeding the maximum rate authorized by Section 53531, may be payable at the time or times, may be in one or more series, may bear a date or dates, may mature at a time or times not exceeding 31 years from their respective dates, may be payable in the medium of payment at a place or places, may carry the registration privileges, may be subject to the terms of redemption at the premiums, may be executed in a manner, may contain those terms, covenants and conditions, and may be in the form, either coupon or registered, as the resolution authorizing the bonds may provide. The bonds may be sold at public or private sale in the manner and upon the terms as may be provided in the resolution. Pending the preparation of definitive bonds, interim receipts or certificates, in the form and with those provisions as may be provided in the resolution, may be issued to the purchaser or purchasers of bonds sold pursuant to this article. The bonds and interim receipts or certificates shall be deemed to be securities and negotiable instruments within the meaning and for all purposes of the Uniform Commercial Code of this state, subject to the provisions for registration thereof contained in the resolution. Prior to approving the sale of bonds at a private sale, the legislative body of the issuing entity shall retain an investment firm which has had no prior underwriting relationship with the issuing entity on a similar bond issue within the previous three years to analyze the terms and conditions of the proposed bond issue. The bonds shall be sold at private sale only if the investment firm determines and reports to the legislative body that it has found the following to be true: (a) The underwriter’s price differential is reasonable. (b) The final negotiated offering is consistent with common practices in the industry and is comparable to other bond offerings of a comparable amount that have been offered within the previous six months.