All taxes of the city that shall have been levied prior to September 1, 1961, including delinquent taxes, shall be collected and the payment thereof enforced in the same manner and upon the same penalties, and property sold for the nonpayment thereof and redeemed from such sale in the same manner and under the same conditions as provided by the laws in force in the city on September 1, 1961, and the officers of the city shall collect and enforce the payment of such taxes, including delinquent taxes, and do any and all things that may become necessary in the sale of property for nonpayment of such taxes and in the redemption thereof from such sale.
('81 Code, § 3.04.020)