California Code, Government Code - GOV § 11005.2

(a) Unless the Legislature specifically provides that approval by the Director of General Services is not required, every conveyance, contract, or agreement whereby an interest of the state in any real property is conveyed, demised, or let to any person, shall, before the conveyance, contract, or agreement is executed or entered into, be approved by the Director of General Services.  Any conveyance, contract, or agreement executed or entered into in violation of this section is void.  This section shall apply to any state agency which, by general or specific statute, is expressly or impliedly authorized to enter into transactions referred to in this section.

(b) This does not apply to real property acquired by the Department of Transportation for highway purposes, real property acquired by the High-Speed Rail Authority for high-speed rail purposes, or real property administered by the State Lands Commission, the Controller, or the State Compensation Insurance Fund.