Cal. PCC § 10215.4

(a) After selecting a design-build entity for the design and preconstruction phase, the department may enter into a contract and direct the design-build entity to begin design and preconstruction activities sufficient to establish a guaranteed maximum price for the project.

(b) Subject to Section 13332.19 of the Government Code, if otherwise applicable to the department, upon agreement of the guaranteed maximum price for the design-build project, the department, at its sole and absolute discretion, may amend its contract with the design-build entity, or enter into a new contract, and direct the entity to complete the remaining design, preconstruction, and construction activities sufficient to complete and close out the design-build project, and may add funds not exceeding the guaranteed maximum price to the contract for these activities. Any amendment of the existing contract or a new contract with the design-build entity shall not require any additional competitive process. This section does not require the department to amend an existing contract or enter into a new contract for remaining design, preconstruction, or construction activities.

(c) If the cost for completing all remaining design, preconstruction, and construction activities sufficient to complete and close out the design-build project exceeds the guaranteed maximum price, the costs exceeding the guaranteed maximum price shall be the responsibility of the design-build entity. If the cost for these activities is less than the guaranteed maximum price, the design-build entity shall not be entitled to the difference between the cost and the guaranteed maximum price. Any savings provided to the department shall revert to the fund from which the appropriation was made.

(d) If the department and the design-build entity do not reach an agreement on a guaranteed maximum price or the department otherwise elects not to have the design-build entity complete some or all of the remaining work, the department may solicit proposals to complete some or all of the remaining work from firms that submitted a statement of qualifications pursuant to subdivision (b) of Section 10215.2. The department may also, upon written determination that it is in the best interest of the state to do so, formally solicit proposals from other entities to complete all or some of the remaining work, or complete the design-build project using other delivery methods. Subject to Section 13332.19 of the Government Code, if otherwise applicable to the department, any contract awarded shall be made on a best value basis.