US SB2360

Divides the Ninth Judicial Circuit into two circuits: a new Ninth Circuit (California, Guam, Hawaii) and a new Twelfth Circuit (Alaska, Arizona, Idaho, Montana, Nevada, Oregon, Washington)

Increases the total number of federal judicial circuits from 13 to 14 and authorizes 2 additional circuit court judges for the former Ninth Circuit prior to the split

Allocates 18 circuit judges to the new Ninth Circuit and 13 circuit judges to the new Twelfth Circuit

Assigns active circuit judges to the new circuits based on their official duty station location, while senior judges may elect which circuit to join

Takes effect 1 year after enactment, with a 2-year administrative transition period for the former Ninth Circuit court structure