California Code, Vehicle Code - VEH § 1821

(a) The department shall establish and maintain a data and monitoring system to evaluate the efficacy of intervention programs for persons convicted of violations of Section 23152 or 23153.

(b) The system may include a recidivism tracking system. The recidivism tracking system may include, but not be limited to, jail sentencing, license restriction, license suspension, level I (first offender) and II (multiple offender) alcohol and drug education and treatment program assignment, alcohol and drug education treatment program readmission and dropout rates, adjudicating court, length of jail term, actual jail or alternative sentence served, type of treatment program assigned, actual program compliance status, subsequent crashes related to driving under the influence of alcohol or drugs, and subsequent convictions of violations of Section 23152 or 23153.

(c) The systems described in subdivisions (a) and (b) shall include an evaluation of the efficacy of the increased level of intervention resulting from the act that added this subdivision.

(d) The department shall submit an annual report of its evaluations to the Legislature. The evaluations shall include a ranking of the relative efficacy of criminal penalties, other sanctions, and intervention programs and the various combinations thereof, including, but not limited to, those described in subdivision (c).