The owner, lessee, or any other person in possession or control of a designated historical landmark shall prevent:
A. The deterioration or decay of any exterior portion of the historical resource; and
B. The deterioration or decay of any interior portions of an historical resource if such maintenance is necessary to preserve any exterior portion of the historical resource.
“Deterioration or decay" refers to those conditions of the structure or improvement that threaten the structural or historical integrity of the resource or improvement.
(Ord. 2410 §18)