For actual attendance at the place of trial or hearing and for the time necessarily occupied in going to and from such place at the beginning and end of such service or at any time during the same, Thirty Dollars ($30.00) per day, except that any juror required to attend more than thirty (30) days in hearing one case may be paid in the discretion and upon the certification of the judge a per diem fee not exceeding Forty Dollars ($40.00) for each day in excess of thirty (30) days he is required to hear each case.

Whenever in any case the jury is ordered to be kept together and not to separate, the cost of subsistence during such period shall be paid upon the order of the court. Jury fees provided by this section shall be paid on the certificate of the clerk of the court, and in the case of jury fees in excess of Thirty dollars ($30.00) per diem, when allowed as hereinabove provided, on the certificate of the trial judge.

SOURCE: CCP § 680.9.