Cal. Lab. Code § 1771.6

(a) Any awarding body that enforces this chapter in accordance with Section 1726 or 1771.5 shall provide notice of the withholding of contract payments to the contractor and subcontractor, if applicable. The notice shall be in writing and shall describe the nature of the violation and the amount of wages, penalties, and forfeitures withheld. Service of the notice shall be completed pursuant to Section 1013 of the Code of Civil Procedure by first-class and certified mail to the contractor and subcontractor, if applicable. The notice shall advise the contractor and subcontractor, if applicable, of the procedure for obtaining review of the withholding of contract payments.
The awarding body shall also serve a copy of the notice by certified mail to any bonding company issuing a bond that secures the payment of wages covered by the notice and to any surety on a bond, if their identities are known to the awarding body.
(b) The withholding of contract payments in accordance with Section 1726 or 1771.5 shall be reviewable under Section 1742 in the same manner as if the notice of the withholding was a civil penalty order of the Labor Commissioner under this chapter. If review is requested, the Labor Commissioner may intervene to represent the awarding body.
(c) Pending a final order, or the expiration of the time period for seeking review of the notice of the withholding, the awarding body shall not disburse any contract payments withheld.
(d) From the amount recovered, the wage claim shall be satisfied prior to the amount being applied to penalties. If insufficient money is recovered to pay each worker in full, the money shall be prorated among all workers.
(e) Wages for workers who cannot be located shall be placed in the Industrial Relations Unpaid Wage Fund and held in trust for the workers pursuant to Section 96.7. Penalties shall be paid into the General Fund of the awarding body that has enforced this chapter pursuant to Section 1771.5.