B. Marking and Lighting. Notwithstanding subsection A of this section, the owner of any existing nonconforming structure or tree is hereby required to permit the installation, operation, and maintenance thereon of such markers and lights as shall be deemed necessary by the planning commission to indicate to the operators of aircraft in the vicinity of the airport the presence of such airport obstruction. Such markers and lights shall be installed, operated, and maintained at the expense of the county of Del Norte.
(Ord. 80-14 (part), 1980.)