California Code, Vehicle Code - VEH § 13209

Before sentencing a person upon a conviction of a violation of Section 23152 or 23153, the court shall obtain from the department a record of any prior convictions of that person for traffic violations. The department shall furnish that record upon the written request of the court.

Notwithstanding the provisions of Section 1449 of the Penal Code, in any such criminal action the time for pronouncement of judgment shall not commence to run until the time that the court receives the record of prior convictions from the department.