California Code, Civil Code - CIV § 8814

(a) If a direct contractor has withheld a retention from one or more subcontractors, the direct contractor shall, within 10 days after receiving all or part of a retention payment, pay to each subcontractor from whom retention has been withheld that subcontractor's share of the payment.

(b) If a retention received by the direct contractor is specifically designated for a particular subcontractor, the direct contractor shall pay the retention payment to the designated subcontractor, if consistent with the terms of the subcontract.

(c) If a good faith dispute exists between the direct contractor and a subcontractor, the direct contractor may withhold from the retention to the subcontractor an amount not in excess of 150 percent of the estimated value of the disputed amount.