California Code, Government Code - GOV § 57377

Officers, except members of the city council, shall hold office until the first succeeding general municipal election held in the city and until their successors are elected and qualified.  Of the five elected members of the city council, the two receiving the lowest number of votes shall hold office until the first succeeding general municipal election held in the city and until their successors are elected and qualified, and the three receiving the highest number of votes shall hold office until the second succeeding general municipal election held in the city and until their successors are elected and qualified.  If two or more members of the city council are elected by the same number of votes, the terms of each shall be determined by lot.  The members of the city council elected to succeed the members elected at the incorporation election shall hold office for four years from the Tuesday succeeding their election, and until their successors are elected and qualified.