Cal. Gov. Code § 29930
When the board of supervisors deems it in the best interests of the county, it may authorize the county treasurer, upon such terms and conditions as may be fixed by the board of supervisors, to issue notes, on a competitive-bid basis, maturing within a period not to exceed one year, in anticipation of the sale of bonds duly authorized at the time such notes are issued. The proceeds from the sale of such notes shall be used only for the purposes for which may be used the proceeds of the sale of bonds in anticipation whereof the notes were issued.
All notes issued and any renewal thereof shall be payable at a fixed time, solely from the proceeds of the sale of the bonds and not otherwise, except that in the event that the sale of the bonds shall not have occurred prior to the maturity of the notes issued in anticipation of the sale, the county treasurer shall, in order to meet the notes then maturing, issue renewal notes for such purpose. No renewal of a note shall be issued after the sale of bonds in anticipation of which the original note was issued. There shall be only one renewal of such note or notes.
Every note and any renewal thereof shall be payable from the proceeds of the sale of bonds and not otherwise. The total amount of such notes or renewals thereof issued and outstanding shall at no time exceed the total amount of the unsold bonds.
Interest on the notes shall be payable from proceeds of the sale of bonds.
Ca. Gov. Code § 29930