[foobarian]

Except how does the landlord know? Surprise inspections? And what are the penalties? This should all be spelled out in the lease contract.

[sitharus]

Here a landlord can do an inspection with 48 hours notice. If you're out of town they are allowed access without you present. Also the landlord can end your tenancy with 90 days notice with no reason.

Penalties would depend on the adjudicator's opinion of the damages and risk.