Cal. PCC § 7103

(a) (1) Every original contractor that is awarded a contract by a state entity, as defined in subdivision (d), involving an expenditure in excess of twenty-five thousand dollars ($25,000) for any public work shall, before entering upon the performance of the work, file a payment bond with and approved by the officer or state entity that awarded the contract. The bond shall be in a sum not less than 100 percent of the total amount payable by the terms of the contract.

(2) The state entity shall state in its call for bids for any contract that a payment bond is required in the case of such an expenditure.

(b) A payment bond filed and approved in accordance with this section shall be sufficient to enter upon the performance of work under a duly authorized contract that supplements the contract for which the payment bond was filed if the requirement of a new bond is waived by the state entity.

(c) For purposes of this section, providers of architectural, engineering, and land surveying services pursuant to a contract with a state entity for a public work shall not be deemed an original contractor and shall not be required to post or file the payment bond required in subdivisions (a) and (b).

(d) For purposes of this section, “state entity” means every state office, department, division, bureau, board, or commission, but does not include the Legislature, the courts, any agency in the judicial branch of government, or the University of California. All other public entities shall be governed by Section 9550 of the Civil Code.

(e) For purposes of this section, “public work” includes the erection, construction, alteration, repair, or improvement of any state structure, building, road, or other state improvement of any kind.