Cal. Gov. Code § 53073
Notwithstanding anything in the law to the contrary, the governing body of any public district may convey, upon such terms and conditions as it determines to be in the public interest, any surplus real property, together with any building thereon, owned by the district which has been determined by the governing body to be of general historical interest within the area of the district, to an association or society the purpose of which is to research and promote the area's historical heritage or to preserve property of historical interest and which is a nonprofit corporation formed under the laws of this state. Any such conveyance shall contain a condition to the effect that the historical nature of the property be restored, preserved, or both, for the benefit of the citizens of the area, and that title will revert to the district in the event that the association or society conveys the property in question to any person or entity which is not a nonprofit corporation involved with preserving and researching the history of the area.
Ca. Gov. Code § 53073