California Code, Penal Code - PEN § 1213

(a)(1) When a probationary order or a judgment, other than of death, has been pronounced, a copy of the entry of that portion of the probationary order ordering the defendant confined in a city or county jail as a condition of probation, or a copy of the entry of the judgment, or, if the judgment is for imprisonment in the state prison or imprisonment pursuant to subdivision (h) of Section 1170, either a copy of the minute order or an abstract of the judgment as provided in Section 1213.5, certified by the clerk of the court, and a Criminal Investigation and Identification (CII) number shall be forthwith furnished to the officer whose duty it is to execute the probationary order or judgment, and no other warrant or authority is necessary to justify or require its execution.

(2) When a person has been resentenced and there is a reasonable basis to believe the remaining time to serve in custody is less than 30 days, the information described in paragraph (1) shall be furnished to the executing officer within 24 hours.  The information may be furnished by electronic means.