Cal. Pub. Res. Code § 4597.9

In the event of a change of ownership of the land described in the working forest management plan, the working forest landowner shall notify the new landowner of the existence of the plan and the need to notify the department of the new landowner’s intent regarding assumption of the plan. Notification shall be in writing with a copy to the department of the new landowner’s intent regarding assumption of the plan. The new landowner shall have one year from the date of the receipt of the notification by the department to notify the department in writing of his or her assumption of the plan. If the department does not receive notification within this period, the plan shall expire one year from the date the new landowner is advised by the department of the necessity to assume the plan.