Cal. Civ. Proc. Code § 874.050

(a) The court may order that the share of the costs apportioned to a future interest be paid by other parties to the action or by the persons who are then the presumptive owners of the future interest.

(b) Where the court orders payment pursuant to this section, such payment is subject to a right of reimbursement, with interest at the legal rate, secured by a charge upon the future interest.