In the event of the failure of an owner or person in control to trim, or cause to be trimmed, any trees, hedges or shrubs as provided in sections 7-7-9 through 7-7-11 of this chapter, within the time provided by notice served pursuant to the preceding section, such trees, etc., may be trimmed by the city; and the expenses therefor shall be deemed a debt to the city on the part of said owner or person in control. (Ord. 827, 9-5-2000)