Cal. Vehicle Code - VEH § 23665. Section 23665.
(a)
If a person is convicted of a violation of Section 20001, or of Section 23152 or 23153 and is sentenced to one year in a county jail or more than one year in the state prison under Section 23540, 23542, 23546, 23548, 23550, 23550.5, 23552, 23554, 23556, 23558, 23560, 23562, 23566, or 23568, the court may postpone the revocation or suspension of the person’s driving privilege until the term of imprisonment is
served.
(b)
This section shall become operative on September 20, 2005.