Public Utilities Code § 6005

The advertisement shall state that bids will be received for the franchise and that it will be awarded to the highest bidder. The advertisement shall be published once a day for 10 successive days, or as often during that period as the paper is published, if it is a daily newspaper. If there is no daily newspaper published in the county, city and county, or city, it shall be published in a weekly newspaper once a week for four successive weeks. In either case the full publication shall be completed not less than 20 nor more than 30 days before any further action can be taken thereon.