If a deficiency occurs in the redemption fund with which to pay past due bonds, past due interest, or bonds or interest which will become due during the current tax collecting year, but it does not appear to the treasurer that there will be an ultimate loss to the bondholders, he shall pay matured bonds as presented and make interest payments when due as long as there are available funds in the redemption fund, in the following order of priority:
Bonds not paid when presented, and interest payments not paid when due, shall bear interest at the rate stated in the bonds, without compounding, until paid.
Ca. Sts. and High. Code § 8775