Constitution of the State of California 1879 Art. IV, § 18

Sec. 18.  (a) The Assembly has the sole power of impeachment.  Impeachments shall be tried by the Senate.  A person may not be convicted unless, by rollcall vote entered in the journal, two thirds of the membership of the Senate concurs.

(b) State officers elected on a statewide basis, members of the State Board of Equalization, and judges of state courts are subject to impeachment for misconduct in office.  Judgment may extend only to removal from office and disqualification to hold any office under the State, but the person convicted or acquitted remains subject to criminal punishment according to law.