Any person or persons who own or possess property shall post reflective devices on fences, guy wires, tree supports, chains or other possible obstructions. These obstructions must be marked in a manner that is visible during inclement weather and darkness. Each obstruction must have a sufficient number of reflective devices to assure visibility from at least twenty-five (25) feet. [Ord. 121 Modification 1 of Ord. 121, 1980; prior code § 9.18.020.]