Cal. Civil Code § 8024

(a) “Laborer” means a person who, acting as an employee, performs labor upon, or bestows skill or other necessary services on, a work of improvement. (b) “Laborer” includes a person or entity to which a portion of a laborer’s compensation for a work of improvement, including, but not limited to, employer payments described in Section 1773.1 of the Labor Code and implementing regulations, is paid by agreement with that laborer or the collective bargaining agent of that laborer. (c) A person or entity described in subdivision (b) that has standing under applicable law to maintain a direct legal action, in its own name or as an assignee, to collect any portion of compensation owed for a laborer for a work of improvement, shall have standing to enforce any rights or claims of the laborer under this part, to the extent of the compensation agreed to be paid to the person or entity for labor on that improvement. This subdivision is intended to give effect to the longstanding public policy of this state to protect the entire compensation of a laborer on a work of improvement, regardless of the form in which that compensation is to be paid.