California Code, Public Contract Code - PCC § 10830

(a) No person, firm, or subsidiary thereof who has been awarded a consulting services contract may submit a bid or be awarded a contract on or after July 1, 2003, for the provision of services, the procurement of goods or supplies, or any other related action that is required, suggested, or otherwise deemed appropriate in the end product of the consulting services contract.

(b) This section does not apply to any person, firm, or subsidiary thereof who is awarded a subcontract of a consulting services contract that amounts to no more than 10 percent of the total monetary value of the consulting services contract.

(c) This section does not apply to consulting services contracts subject to Chapter 10 (commencing with Section 4525) of Division 5 of Title 1 of the Government Code.