Cal. Gov. Code § 977.6
The local taxing entity may sell the bonds at the times or in the manner the board deems to be to the public interest. The bonds shall be sold on sealed proposals to the highest bidder after advertising for bids by publication of notice of sale pursuant to Section 6061, not less than 10 days prior to the date of sale, in a newspaper of general circulation circulating in the local taxing entity. If there is no such newspaper, the notice of sale shall be posted in three places in the local public entity for two succeeding weeks ending not less than 10 days prior to the date of sale. If satisfactory bids are received, the bonds offered for sale shall be awarded to the highest responsible bidder. If no bids are received or if the board determines that the bids received are not satisfactory as to price or responsibility of the bidders, the board may reject all bids received, if any, and either readvertise or sell the bonds at private sale.
Ca. Gov. Code § 977.6