In the event that costs are assessed against the real property, the county treasurer of Snohomish County, upon certification to the owner by the city treasurer of the amount being due and owing shall enter the amount of such assessment upon the tax rolls against the property for the current year, and the same shall become a part of the general taxes for that year to be collected at the same time and with the same interest (not to exceed ten percent) and penalties, and when collected shall be deposited to the credit of the general fund of the city; provided, that the city treasurer, upon written request of the owner or party in interest, may divide the amount due into not to exceed ten equal annual installments, subject to earlier payment at the option of the owner or party in interest, provided such installments shall be no less than thirty dollars. (Prior code § 10.10.070.)