Cal. VEH § 23640

(a) In any case in which a person is charged with a violation of Section 23152 or 23153, prior to acquittal or conviction, the court shall neither suspend nor stay the proceedings for the purpose of allowing the accused person to attend or participate, nor shall the court consider dismissal of or entertain a motion to dismiss the proceedings because the accused person attends or participates during that suspension, in any one or more education, training, or treatment programs, including, but not limited to, a driver improvement program, a treatment program for persons who are habitual users of alcohol or other alcoholism program, a program designed to offer alcohol services to problem drinkers, an alcohol or drug education program, or a treatment program for persons who are habitual users of drugs or other drug-related program.

(b) This section shall not apply to any attendance or participation in any education, training, or treatment programs after conviction and sentencing, including attendance or participation in any of those programs as a condition of probation granted after conviction when permitted.