Cal. Penal Code § 1001.29

(a) If it appears that the divertee is not meeting the terms and conditions of the diversion program, the court may hold a hearing and amend the program to provide for greater supervision by the responsible regional center alone, by the probation department alone, or by both the regional center and the probation department. However, notwithstanding the modification of a diversion order, the court may hold a hearing to determine whether the diverted criminal proceedings should be reinstituted if any of the following circumstances exists:
1. (1) The defendant is charged with an additional misdemeanor allegedly committed during the pretrial diversion and that reflects the defendant’s propensity for violence.
2. (2) The defendant is charged with an additional felony allegedly committed during the pretrial diversion.
3. (3) The defendant is engaged in criminal conduct rendering the defendant unsuitable for diversion.
4. (4) The defendant’s performance in the diversion program is unsatisfactory.
(b) In cases of dual agency diversion, a hearing to reinstitute the diverted criminal proceedings may be initiated by either the court, the prosecutor, the regional center, or the probation department.
(c) In cases of single agency diversion, a hearing to reinstitute the diverted criminal proceedings may be initiated only by the court, the prosecutor, or the regional center.
(d) No hearing for either of these purposes shall be held unless the moving agency or the court has given the divertee prior notice of the hearing.
(e) Where the cause of the hearing is a subsequent charge of a felony against the divertee subsequent to the diversion order, any hearing to reinstitute the diverted criminal proceedings shall be delayed until such time as probable cause has been established in court to bind the defendant over for trial on the subsequently charged felony.
(f) This section is operative January 1, 2021.