Responsibility. The owner of the premises shall maintain
the structures and exterior property in compliance with these requirements,
except as otherwise provided for in this chapter. A person shall not
occupy as owner-occupant or permit another person to occupy premises
which are not in a sanitary and safe condition and which do not comply
with the requirements of this chapter. Occupants of a dwelling unit,
rooming unit or housekeeping unit are responsible for keeping in a
clean, sanitary and safe condition that part of the dwelling unit,
rooming unit, housekeeping unit or premises which they occupy and
control. Owners, operators and occupants shall have all the duties,
obligations and responsibilities prescribed in this chapter, and no
such person or entity shall be relieved of any such duty, obligation
or responsibility hereunder, nor be entitled to assert as a defense
against any charge made against him or them for violation of this
chapter the fact that another owner, operator or occupant or any other
third person or entity is also responsible therefor and in violation
thereof.