Each owner, lessee, tenant, occupant or person in charge of any real property within the City, and each agent or representative of any such person, is hereby charged with responsibility for the maintenance and use of such real property in such manner that no use of, or activity or condition upon or within, such real property shall constitute a nuisance; and all such persons are hereby charged with the duty of observing all of the provisions of this article, but such responsibility shall not be construed to permit any other person not charged with such responsibility to commit or maintain any nuisance upon or within any real property in the City.
(1978 Code §15-4)