(a) shall be responsible for ordinary cleanliness of the premises and any chattels provided therein by the landlord;

(b) shall repair within a reasonable time after its occurrence any damage to the premises or to any chattels provided therein by the landlord caused by the wilful or negligent conduct of the tenant or by such conduct of persons who are permitted on the premises by the tenant; and

(c) shall conduct himself and require other persons on the premises with his consent to conduct themselves in a manner that will not cause a disturbance or nuisance.