Redistricting occurs every 10 years. It is the process of redrawing political boundaries after the U.S. Census. The redistricting of California’s Congressional, State Senate, State Assembly and Board of Equalization districts was completed by the voter-approved California Citizens Redistricting Commission. In 2011, the County Board of Supervisors as well as some cities and other local jurisdictions also re-drew their districts.
When political boundaries change, precinct lines must also be change. In 2012 the Elections Office created new precinct lines for San Bernardino County. The process to redistrict and to re-draw precincts is an extensive one that takes hundreds of hours to create new lines, reprogram databases, and to proof the results.