California Code, Public Contract Code - PCC § 20125

The board shall cause an advertisement for bids for the performance of the work to be published pursuant to Section 6062 of the Government Code in a daily newspaper, or pursuant to Section 6066 of the Government Code in a weekly newspaper, of general circulation published in the county. If there is no such newspaper published in the county, the notice shall be given by posting in three public places for at least two weeks.