If, on the first day of January, in any year, two installments of any local improvement assessment are delinquent, or if the final installment thereof has been delinquent, or if the final installment thereof has been delinquent for more than one year, the city attorney is authorized to commence foreclosure proceedings on the delinquent assessment or delinquent installments by an appropriate action on behalf of the city in Pierce County Superior Court. The foreclosure proceeding shall be in accordance with the provisions of Chapter 35.50 RCW, as now exists or as may hereafter be amended. Such foreclosure proceedings shall be commenced on or before September 1, 1986, and thereafter on or before June 1st of each succeeding year. (Ord. 483 § 1, 1986).