As used in this chapter, the following terms shall have the meanings indicated:
ABATE To remove the graffiti by such means, in such a manner and to such extent as the Board of Supervisors or other agent appointed by the Board reasonably determines is necessary to remove the graffiti from public view.
GRAFFITI Any unauthorized inscription, word, figure, painting or other defacement that is written, marked, etched, scratched, sprayed, drawn, painted or engraved on or otherwise affixed to any surface of public or private property by any graffiti implement, to the extent that the graffiti was not authorized in advance by the owner or occupant of the property, or, despite advance authorization, is otherwise deemed a public nuisance by the Board.