Cal. Sts. & High. Code § 8800

Upon default in the payment of any installment of principal or interest on any assessment or reassessment, the lands securing those installments and assessments shall become tax-defaulted in the same manner in which real property in the city becomes tax-defaulted for the nonpayment of general city taxes, and shall be subject to redemption in the same manner and to the same extent that real property in the city which has become tax-defaulted for the nonpayment of general city taxes may be redeemed.