(3) Structure unfit for human occupancy. A structure is unfit for human occupancy or use whenever the Code Official finds that it is unsafe, unlawful, or because of the degree in which it lacks maintenance or is in disrepair, is unsanitary, vermin or rat infested, contains filth and contamination, or lacks ventilation, illumination, sanitary or heating facilities or other essential equipment required by this chapter, or because its location constitutes a hazard to its occupants or to the public.
(4) Unlawful structure. An unlawful structure is one found in whole or in part to be occupied by more persons than, permitted under this chapter, or was erected, altered or occupied contrary to law.
(B) Closing of vacant structures. If the structure or part thereof is vacant and open to unauthorized entry, the Code Official shall issue a notice to remedy the violation by instructing the owner of such premises to cover or secure each door, window or other opening that is located within ten feet of grade or accessible from grade by stairs or roofs within ten feet of grade. If condition only involves one dwelling unit in a structure, only that unit will be affected. Upon failure of the owner to remedy the violation in accordance with the notice, the Code Official shall issue a citation.