California Code, Government Code - GOV § 57379

If the first general municipal election following an incorporation election will occur less than one year after the effective date of incorporation, or occurred on or after November 1, 1987, and less than one year after the incorporation election, of the five elected members of the city council, the two receiving the lowest number of votes shall hold office until the second general municipal election following the incorporation election and until their successors are elected and qualified, and the three receiving the highest number of votes shall hold office until the third general municipal election following the incorporation election and until their successors are elected and qualified.

The first general municipal election following the incorporation election shall not be held unless either a proposition is to be voted upon or offices other than city council member offices are to be filled.

In the event that, pursuant to Section 56724, the first election for city council members was held after the election on the incorporation proposal, the term “incorporation election” in this section means the first election for city council members.