California Code, Public Resources Code - PRC § 5009.1

(a)(1) The department may enter into an agreement to accept funds from any person, educational institution, tribal government, corporation or other business entity, or organization for the maintenance, operation, restoration, repair, development, improvement, or enhancement of a designated state park system unit or facility, or for research, educational, interpretive, recreational, or visitor services provided on or for a designated state park system unit or facility.  Any funds so received shall be deposited in a separate account in the State Park Contingent Fund.  The funds received shall supplement, but not replace, existing resources for the maintenance, operation, restoration, repair, development, improvement, or enhancement of the unit or facility, or for establishing or enhancing park services provided to visitors.  The department and the sponsoring or donating person, entity, government, or organization shall specify in the agreement the level of service that is to be performed.

(2) Each agreement entered into pursuant to paragraph (1) shall include a provision requiring the department to provide to the signatory of the agreement or his or her designee an accounting of all expenditures made from the donated funds until all of the donated funds have been expended.  The accountings shall be provided on a quarterly basis unless a different frequency is agreed to by the parties to the agreement.