Signs that are nonconforming because they are in a public right-of-way; are flashing, fluttering, or moving signs; contain obscene language, symbols, or pictures; or which remain beyond a time limit specified by this chapter or by the sign permits shall be removed or brought into compliance. If such sign is not removed or brought into compliance, the owner or lessee of the property upon which the sign is located shall be subject to prosecution and penalties as provided in Article XII, Enforcement.