California Public Contract Code
When it appears from the estimates of cost that the estimated contract price of any project will not exceed fifteen thousand dollars ($15,000), the trustees may direct that public notice to bidders be given as follows:
(a) By publication for two consecutive insertions in a weekly trade paper of general circulation, published either in Los Angeles or San Francisco, devoted primarily to the dissemination of contract news among contracting firms; and
(b) Once a week for two consecutive weeks in a newspaper of general circulation in the county in which the project is located, or, if located in more than one county in such a newspaper in a county in which a major portion of the work is to be done.
The notices shall state the time and place for the receiving and opening of sealed bids and describe in general terms the work to be done.
When it appears that the estimated contract price will exceed fifteen thousand dollars ($15,000), public notice to bidders shall be given by publication once a week for at least two consecutive weeks, or once a week for more than two consecutive weeks if such longer period of advertising is deemed necessary by the trustees, next preceding the day set for the receiving of bids:
(a) In two trade papers of general circulation, one published in Los Angeles and one in San Francisco, devoted primarily to the dissemination of contract and building news among contracting and building material supply firms; or
(b) In the discretion of the trustees, in one newspaper of general circulation published in the county in which the major portion of the project is located, and in one such trade paper published in the county group, as defined in Section 187 of the Streets and Highways Code, in which the work is to be done.
The notices shall state the time and place for the receiving and opening of sealed bids and that the bids will be required for the entire project and for the performance of segregate designated parts of the entire project, when the trustees determine that segregation is advisable.