California Code, Vehicle Code - VEH § 40508

(a) A person willfully violating his or her written promise to appear or a lawfully granted continuance of his or her promise to appear in court or before a person authorized to receive a deposit of bail is guilty of a misdemeanor regardless of the disposition of the charge upon which he or she was originally arrested.

(b) A person willfully failing to pay bail in installments as agreed to under Section 40510.5 or a lawfully imposed fine for a violation of a provision of this code or a local ordinance adopted pursuant to this code within the time authorized by the court and without lawful excuse having been presented to the court on or before the date the bail or fine is due is guilty of a misdemeanor regardless of the full payment of the bail or fine after that time.

(c) A person willfully failing to comply with a condition of a court order for a violation of this code, other than for failure to appear or failure to pay a fine, is guilty of a misdemeanor, regardless of his or her subsequent compliance with the order.

(d) If a person convicted of an infraction fails to pay bail in installments as agreed to under Section 40510.5, or a fine or an installment thereof, within the time authorized by the court, the court may, except as otherwise provided in this subdivision, impound the person's driver's license and order the person not to drive for a period not to exceed 30 days. Before returning the license to the person, the court shall endorse on the reverse side of the license that the person was ordered not to drive, the period for which that order was made, and the name of the court making the order. If a defendant with a class C or M driver's license satisfies the court that impounding his or her driver's license and ordering the defendant not to drive will affect his or her livelihood, the court shall order that the person limit his or her driving for a period not to exceed 30 days to driving that is essential in the court's determination to the person's employment, including the person's driving to and from his or her place of employment if other means of transportation are not reasonably available. The court shall provide for the endorsement of the limitation on the person's license. The impounding of the license and ordering the person not to drive or the order limiting the person's driving does not constitute a suspension of the license, but a violation of the order constitutes contempt of court.