A. Whenever, on the first day of January, of any year, commencing with the first day of January, 1928, two installments of any local improvement district assessment shall be delinquent, or the final installment thereof shall have been delinquent for more than one year, the city, on or before the first day of December of such year, shall proceed, through its regularly constituted officers as hereafter more particularly designated, with the foreclosure of all such delinquent assessments or installment or installments thereof, as the case may be, by proceeding in the Superior Court of Snohomish County in an action brought in its own name.

B. It shall not be necessary to bring a separate suit for each separate lot, tract or parcel of land or other property, or for each separate local improvement district, but all or any part of the property so delinquent under any or all assessment rolls or local improvement districts in the city may be proceeded against in the same action and all or any of the owners or persons interested in any of the property so delinquent may be joined as parties defendant in a single action to foreclose, and all or any liens for such delinquent assessments, or installment or installments thereof, may be foreclosed in such proceeding. Such proceedings shall be initiated by filing with the clerk of the said Superior Court a certificate of the city treasurer of the city setting forth a description of each such separate lot, tract or parcel of land or other property upon which such assessments, or installment or installments are delinquent, the date of the delinquency and the amount thereof, including penalty and interest thereon, the name of the owner thereof or that such owner is unknown as appears upon the assessment roll, the number and date of the passage of the ordinance authorizing the improvement, the number and date of the passage of the ordinance confirming such assessment roll, and the number of such local improvement district; all such lots, tracts and parcels of land or other property may be included in one certificate; such certificate shall be prepared by the city treasurer once each year prior to the first day of December.

C. Upon the filing of such certificate, the city treasurer with the assistance of the city attorney and such other assistance as the city council may provide, shall proceed with such foreclosure action to judgment and the property shall be sold, all as provided in RCW Chapter 35.50, as now amended or as the same may hereafter be amended.

D. Provided however, that this chapter shall not be deemed to affect pending foreclosure actions, but that such actions now pending for the foreclosure of delinquent local improvement district assessments shall be completed under and pursuant to the ordinances and statutes existing at the time of the institution of such actions. (Prior code § 13.48.140.)