California Code, Public Resources Code - PRC § 5029.5

(a) Notwithstanding any other provision of law, fifty percent (50%) of the revenue collected by the Department of Transportation, in each fiscal year, from rental receipts from a federally designated historic property, or from property listed as a state historical resource pursuant to Section 5024, that is owned by the Department of Transportation and located in a freeway right-of-way corridor, less any amount transmitted in lieu of property tax to a city, county, or city and county, as required by law, shall be deposited in the Historic Property Maintenance Fund, which is hereby created in the Treasury.

(b) Moneys in the fund may be expended by the Department of Transportation, upon appropriation by the Legislature, to pay for costs associated with the maintenance and operation of the historic property described in subdivision (a). Any moneys deposited into the fund are in addition to, and are not intended to supplant or replace, any existing funds that are currently available to any state agency for the operation and maintenance of historical resources.