All signs, billboards and other advertising structures, together with all of their supports, braces, guys and anchors, shall be kept in good repair and in proper state of preservation and working order. The display surfaces of all signs shall be kept neatly painted or posted at all times. The Zoning Administrator after ten (10) days’ notice to the sign or billboard owner may order the removal of any signs or billboards that are not maintained in accordance with the provisions of this chapter and the cost assessed against the property where said sign or billboard is located, however, if the owner of the sign or billboard has promptly ordered the necessary parts to repair the sign or other advertising structure and has not received them or has promptly ordered the repair work done by an authorized erector and the erector has failed to respond within the ten (10) days period, then a further extension of time may be granted, upon filing a verified statement of that such delay is not a result of any act of the sign or billboard owner.