Veh. Code, § 2428

(a) The Department of the California Highway Patrol may fix the cost or pro rata share, or, in its discretion, an amount it considers equivalent to the cost or pro rata share, and collect from each state agency in advance or upon any other basis that it may determine the cost of providing protective services for state employees and property.

(b) Payments for services provided shall be made by direct transfer as described in Section 11255 of the Government Code. All money received by the department pursuant to this section shall be deposited in the Protective Services Fund, which is hereby created. When appropriated by the Legislature, funds in the Protective Services Fund shall be used by the department to fulfill those responsibilities set forth in subdivisions (g), (h), and (i) of Section 2400.

(c) If a state agency refuses to pay the charges fixed by the Department of the California Highway Patrol for security services rendered, the department may file a claim for those charges against any appropriations made for the support or maintenance of all or any part of the work and affairs of the state agency. The Controller shall draw his or her warrant in accordance with law upon the claim in favor of the Department of the California Highway Patrol.