California Code, Code of Civil Procedure - CCP § 875

(a) Where a money judgment has been rendered jointly against two or more defendants in a tort action there shall be a right of contribution among them as hereinafter provided.

(b) Such right of contribution shall be administered in accordance with the principles of equity.

(c) Such right of contribution may be enforced only after one tortfeasor has, by payment, discharged the joint judgment or has paid more than his pro rata share thereof. It shall be limited to the excess so paid over the pro rata share of the person so paying and in no event shall any tortfeasor be compelled to make contribution beyond his own pro rata share of the entire judgment.

(d) There shall be no right of contribution in favor of any tortfeasor who has intentionally injured the injured person.

(e) A liability insurer who by payment has discharged the liability of a tortfeasor judgment debtor shall be subrogated to his right of contribution.

(f) This title shall not impair any right of indemnity under existing law, and where one tortfeasor judgment debtor is entitled to indemnity from another there shall be no right of contribution between them.

(g) This title shall not impair the right of a plaintiff to satisfy a judgment in full as against any tortfeasor judgment debtor.