Cal. Pub. Res. Code § 5079.14

When a lease of real property is made to a private individual, group, or entity, the office shall annually transfer an amount not to exceed 25 percent of the gross income from the lease to the city or, if in an unincorporated area, the county in which the real property is located. Fifty percent of the funds received by the city or county shall be used for historical preservation projects, as approved by the office.