All resolutions imposing or changing the benefit charges shall be filed with the county treasurer or treasurers of each county in which the property is located, together with the record of each public hearing, before November 30 immediately preceding the year in which the benefit charges are to be collected on behalf of the district.
After the benefit charges have been established, the owners of the property subject to the charge shall be notified of the amount of the charge.
RCW 52.18.060