Every occupant of a dwelling containing a single dwelling unit shall be responsible for the extermination of any insects, rodents 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 dwelling unit is the only one infested. Notwithstanding the foregoing provisions of this subsection, whenever infestation is caused by failure of the owner to maintain a dwelling in a ratproof or reasonably insectproof condition, extermination shall be the responsibility of the owner. Whenever infestation exists in two or more of the dwelling units in any dwelling or in the shared or public parts of any dwelling containing two or more dwelling units, extermination thereof shall be the responsibility of the owner.
G.
Every occupant of a dwelling unit shall keep all plumbing fixtures therein in a clean and sanitary condition and shall be responsible for the exercise of reasonable care in the proper use and operation thereof.
H.
It shall be a violation of this chapter for any occupant or tenant to increase the number of persons in the dwelling unit rented by him beyond the number permitted in this chapter, and whenever such occupant or tenant is found responsible for such violation, such person will be subject to the penalties prescribed herein.
I.
No owner or other person shall occupy or let to another person any vacant dwelling or dwelling unit unless said dwelling or dwelling unit and the premises are clean, sanitary, fit for human occupancy and comply with all applicable legal requirements of the State of Connecticut and the state municipalities.
J.