This law requires county boards that use district-based elections to set boundaries for their supervisorial districts. They must do this either after deciding to switch to district-based elections or after each ten-year federal census.

This law is about counties that choose their board of supervisors based on districts. It specifies that the rules in this chapter are relevant to electing supervisors by district or from districts.

In California, once a board sets its district boundaries, it generally cannot change them until the next federal census. There are exceptions, such as if a court orders a change, if the current boundaries violate the Constitution or the Voting Rights Act, if county boundaries change, if the number of supervisors changes, or if an independent redistricting commission takes charge. Additionally, if a board is setting up districts for the first time or switching from at-large elections to district elections, they can set new boundaries between censuses.

This law says if a county supervisor is already elected and serving their term, changing the district boundaries won't affect their position. They'll continue representing their district as it was when they were elected. However, if an area temporarily lacks representation due to redistricting, other officials can be assigned to help residents.

When new district boundaries are set, supervisors for each district will be elected in the next regular election, not including special or recall elections. This doesn't apply if a county moves from at-large to district-based elections.

Boundary changes can't happen between the primary and general elections if a county uses both.

You can't be a supervisor unless you meet certain legal requirements outlined in other specific sections of the code.