Any snow or ice remaining on the public sidewalks of the City is in violation of this article and may be removed by the Public Works Director or other authorized employee. The Public Works Director or other authorized employee shall determine the cost of such removal, and the owner of the property abutting the sidewalk from which the City has removed the snow or ice shall be charged for said cost. If the cost is not paid within 30 days, the City Council shall assess and levy and cause to be collected the amount of the charges as a special assessment upon and against the property involved in the manner as provided for by law for the levy and collection of other special assessments.