Cal. Gov. Code § 14154
In addition to the purposes for which money is appropriated to the department or any division thereof, all of such money or so much thereof as may be necessary, is hereby appropriated and may be expended by the department for the performance of such work. Such expenditures shall be limited to those items for which the Government of the United States has agreed to reimburse the State in full, except for general administrative expenses which shall be chargeable to the funds appropriated for the support or administration of the division doing the work. Such expenditures, to the extent to which the United States is obligated to reimburse the State, shall be considered as temporary advancements for the performance of such work and shall not be considered as expenditures of state funds. Such expenditures shall be excluded in making the computations required by Article 2, Chapter 3, Part 1, Division 3 of this title. Money received from the Government of the United States as reimbursements for such expenditures shall be deposited in the State Treasury to the credit of the fund from which the advancements were made.
Ca. Gov. Code § 14154