Extermination. Every occupant of a dwelling containing a single dwelling unit shall be responsible for the extermination of any rodents, vermin or other pests therein or on the premises; and every occupant of a dwelling unit in a dwelling containing more than one dwelling unit shall be responsible for such extermination whenever his or her dwelling unit is the only one infested; except that whenever such infestation is caused by the failure of the owner to carry out the provisions of this chapter, extermination shall be the responsibility of the owner.
E.
Use of Screens. The owner of a dwelling, dwelling unit or structure shall be responsible for providing and hanging all screens and double or storm doors and windows where used for ventilation whenever the same are required under the provisions of this chapter or any rule or regulation adopted pursuant thereto, except where there is a written agreement between the owner and occupant.
In the absence of such an agreement, maintenance or replacement of screens, storm doors and windows, once installed in any one season, become the responsibility of the occupant.
F.
Maintenance of Plumbing and Equipment. Every occupant of a dwelling unit shall be responsible for the exercise of proper care and cleanliness in the use and operation of all plumbing fixtures, sanitary facilities, appliances and equipment therein.
G.