Section 704 Of Chapter 1. Competency From California Evidence Code >> Division 6. >> Chapter 1.
704
. (a) Before a juror sworn and impaneled in the trial of an
action may be called to testify before the jury in that trial as a
witness, he shall, in proceedings conducted by the court out of the
presence and hearing of the remaining jurors, inform the parties of
the information he has concerning any fact or matter about which he
will be called to testify.
(b) Against the objection of a party, a juror sworn and impaneled
in the trial of an action may not testify before the jury in that
trial as a witness. Upon such objection, the court shall declare a
mistrial and order the action assigned for trial before another jury.
(c) The calling of a juror to testify before the jury as a witness
shall be deemed a consent to the granting of a motion for mistrial,
and an objection to such calling of a juror shall be deemed a motion
for mistrial.
(d) In the absence of objection by a party, a juror sworn and
impaneled in the trial of an action may be compelled to testify in
that trial as a witness.