Proposition 27 was an unsuccessful ballot proposition on the November 2, 2010 ballot in California, placed there by the initiative process. If approved, this measure would have repealed California Proposition 11 (2008), which authorized the creation of the California Citizens Redistricting Commission to draw the electoral boundaries for State Assembly and State Senate districts. It would also have modified the provision in California law that says that proposed congressional districts can't be subjected to a veto referendum.