In case the owner or occupant neglects or refuses to abate the nuisance pursuant to such notice, the director of recreation and parks shall abate the same in such manner as they deems proper, and the cost thereof shall be levied and collected as a special assessment against the property as hereinafter provided. (Ord. 4420-NS (part), 1969: Ord. 3380-NS § 5.3, 1954)