In furtherance of the purposes of this chapter, it shall be
the duty and responsibility of the owner, occupant and any other person
responsible for maintenance of the property or premises to comply
with any and all of the requirements and standards of this chapter
and to promptly remove, prevent or abate such conditions. No such
person shall be relieved of any 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, occupant or any other person is also responsible and
in violation.