A district which has added additional directors pursuant to Section 32100.01, but has not been divided into zones, may, in the manner provided by Section 32100.1, divide the district into zones, except that the resolution of the board of directors shall divide the district into seven zones. If at the expiration of the terms of office of the members of the board, in office at the time of such division into zones, four members of the board are to be elected, those four members shall be elected from zones designated by odd numbers; if three members are to be elected, those three members shall be elected from zones designated by even numbers.
Source:
Section 32100.04, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=32100.04..