All signs, together with their supports, braces, guys and anchors, shall be kept in good working order and safe condition.

The owner of the lot on which the sign is located shall be directly responsible for keeping such sign, including its illumination sources, in good working order and safe condition and maintained in its original condition.

Unsightly, damaged, deteriorated signs or signs in danger of falling shall be returned to their original condition or removed.

With the exception of real estate and temporary signs, all signs and their supports, braces, guys and anchors, which pertain to a business no longer conducted on the premises where such sign is located shall be removed by the owner of the lot on which the sign is located within five days following cessation of the relevant activity.

Non-conforming signs shall be completely and totally removed at such time as the use changes or ownership of the business changes.