California Code, Penal Code - PEN § 193.7

A person convicted of a violation of subdivision (b) of Section 191.5 that occurred within seven years of two or more separate violations of Section 23103, as specified in Section 23103.5, of, or Section 23152 or 23153 of, the Vehicle Code, or any combination thereof, that resulted in convictions, shall be designated as an habitual traffic offender subject to paragraph (3) of subdivision (e) of Section 14601.3 of the Vehicle Code, for a period of three years, subsequent to the conviction. The person shall be advised of this designation pursuant to subdivision (b) of Section 13350 of the Vehicle Code.