California Code, Public Contract Code - PCC § 22162

(a) Except as provided in subdivision (b), and notwithstanding any other law, a local agency, with approval of its governing body, may procure design-build contracts for public works projects in excess of one million dollars ($1,000,000), awarding the contract either the low bid or the best value, provided that this article shall not apply to any projects on the state highway system.

(b) When a local agency described in paragraph (3) of subdivision (f) of Section 22161 awards a contract for the acquisition and installation of technology applications or surveillance equipment designed to enhance safety, disaster preparedness, and homeland security efforts, there shall be no cost threshold and the contract may be awarded to the lowest responsible bidder or by using the best value method.

(c) The local agency shall develop guidelines for a standard organizational conflict-of-interest policy, consistent with applicable law, regarding the ability of a person or entity, that performs services for the local agency relating to the solicitation of a design-build project, to submit a proposal as a design-build entity, or to join a design-build team. This conflict-of-interest policy shall apply to each local agency entering into design-build contracts authorized under this chapter.