Cal. Veh. Code § 23566

(a) If a person is convicted of a violation of Section 23153 and the offense occurred within 10 years of two or more separate violations of Section 23103, as specified in Section 23103.5, or Section 23152 or 23153, or any combination of these violations, that resulted in convictions, that person shall be punished by imprisonment in the state prison for a term of two, three, or four years and by a fine of not less than one thousand fifteen dollars ($1,015) nor more than five thousand dollars ($5,000). The person’s privilege to operate a motor vehicle shall be revoked by the Department of Motor Vehicles pursuant to paragraph (6) of subdivision (a) of Section 13352. The court shall require the person to surrender the driver’s license to the court in accordance with Section 13550.
(b) If a person is convicted of a violation of Section 23153, and the act or neglect proximately causes great bodily injury, as defined in Section 12022.7 of the Penal Code, to any person other than the driver, and the offense occurred within 10 years of two or more separate violations of Section 23103, as specified in Section 23103.5, or Section 23152 or 23153, or any combination of these violations, that resulted in convictions, that person shall be punished by imprisonment in the state prison for a term of two, three, or four years and by a fine of not less than one thousand fifteen dollars ($1,015) nor more than five thousand dollars ($5,000). The person’s privilege to operate a motor vehicle shall be revoked by the Department of Motor Vehicles pursuant to paragraph (6) of subdivision (a) of Section 13352. The court shall require the person to surrender the driver’s license to the court in accordance with Section 13550.
(c) If a person is convicted under subdivision (b), and the offense for which the person is convicted occurred within 10 years of four or more separate violations of Section 23103, as specified in Section 23103.5, or Section 23152 or 23153, or any combination of these violations, that resulted in convictions, that person shall, in addition and consecutive to the sentences imposed under subdivision (b), be punished by an additional term of imprisonment in the state prison for three years.
The enhancement allegation provided in this subdivision shall be pleaded and proved as provided by law.
(d) A person convicted of Section 23153 punishable under this section shall be designated as a habitual traffic offender 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.
(e) A person confined in state prison under this section shall be ordered by the court to participate in an alcohol or drug program, or both, that is available at the prison during the person’s confinement. Completion of an alcohol or drug program under this section does not meet the program completion requirement of paragraph (6) of subdivision (a) of Section 13352, unless the drug or alcohol program is licensed under Section 11836 of the Health and Safety Code, or is a program specified in Section 8001 of the Penal Code.