a. Any dwelling or part thereof, which, because of a structural or fire safety hazard, defects in plumbing, sewage, drainage, or cleanliness, or any other violation of this code or any other applicable law, constitutes a danger to the life, health, or safety of its occupants, shall be deemed to be unfit for human habitation.
b. The department may order or cause any dwelling or part thereof which is unfit for human habitation to be vacated.