2005 California Penal Code Sections 893-894 Article 1. Qualifications of Grand Jurors

893.  (a) A person is competent to act as a grand juror only if he
possesses each of the following qualifications:
   (1) He is a citizen of the United States of the age of 18 years or
older who shall have been a resident of the state and of the county
or city and county for one year immediately before being selected and
returned.
   (2) He is in possession of his natural faculties, of ordinary
intelligence, of sound judgment, and of fair character.
   (3) He is possessed of sufficient knowledge of the English
language.
   (b) A person is not competent to act as a grand juror if any of
the following apply:
   (1) The person is serving as a trial juror in any court of this
state.
   (2) The person has been discharged as a grand juror in any court
of this state within one year.
   (3) The person has been convicted of malfeasance in office or any
felony or other high crime.
   (4) The person is serving as an elected public officer.
894.  Sections 204, 218, and 219 of the Code of Civil Procedure
specify the exemptions and the excuses which relieve a person from
liability to serve as a grand juror.