Cal. Pub. Util. Code § 29282

If the registered bonds, notes, coupons, and other evidences of indebtedness are not presented for payment within 30 days from mailing of the notice, the chief financial officer shall apply the fund set aside to the payment of the unpaid registered bonds, notes, coupons, and other evidences of indebtedness next in order, until all registered bonds, notes, coupons, and other evidences of indebtedness have been called.