(a) Any non-conforming sign which is structurally altered shall be made to comply with the provisions of this Chapter. For the purposes of this Chapter structurally altered shall mean any physical changes to the dimensions, structural support, foundation, lighting provisions, or electrical wiring of any non-conforming sign.
(b) Any non-conforming sign which is damaged or destroyed to an extent greater than fifty percent (50%) of original cost as determined by the Zoning Administrator shall be removed and shall only be replaced with a sign conforming to the provisions of this Chapter.
(c) A sign is or becomes nonconforming if it is not in conformance with the provisions of this Chapter.
(d) A change in the ownership of the real estate or a change in the management of the property or business activity does not affect the status of an existing sign under this Chapter.
(e) Window signs erected prior to the date of this Section shall be removed or altered to comply with the provisions of this Chapter within thirty (30) days after notification of violation by the Zoning Administrator
(f) The Design and Construction Board of Review may grant exceptions to these standards whenever a sign has been designated as a historic landmark.