Cal. Pub. Contract Code § 20471
The commission shall, pursuant to an order entered in the minutes, advertise for bids for the construction of the project either as a whole or in sections, as it may deem fit, in accordance with the plan theretofore adopted and filed, by publishing a notice calling for bids at least once each week for two successive weeks in a newspaper of general circulation published within the district. The notice shall refer to the order and plan for further particulars. If the commission elects to receive separate bids for the construction of sections of the project, the order shall describe the sections for which separate bids are desired. The commission may advertise at the same time and in the same notice both for bids for the construction of the project as a whole and for bids for the construction of separate sections.
Ca. Pub. Cont. Code § 20471