California Code, Penal Code - PEN § 1227

(a) If for any reason other than the pendency of an appeal pursuant to subdivision (b) of Section 1239 of this code a judgment of death has not been executed, and it remains in force, the court in which the conviction was had shall, on application of the district attorney, or may upon its own motion, make and cause to be entered an order specifying a period of 10 days during which the judgment shall be executed.  The 10-day period shall begin no less than 30 days after the order is entered and shall end no more than 60 days after the order is entered.  Immediately after the order is entered, a certified copy of the order, attested by the clerk, under the seal of the court, shall, for the purpose of execution, be transmitted by registered mail to the warden of the state prison having the custody of the defendant;  provided, that if the defendant be at large, a warrant for his apprehension may be issued, and upon being apprehended, he shall be brought before the court, whereupon the court shall make an order directing the warden of the state prison to whom the sheriff is instructed to deliver the defendant to execute the judgment within a period of 10 days, which shall not begin less than 30 days nor end more than 60 days from the time of making such order.

(b) From an order fixing the time for and directing the execution of such judgment as herein provided, there shall be no appeal.