When you move in you can request that landlord have the lock
on your door changed. Landlords have to provide this service
at no cost to you unless the lock was already changed since
the previous tenant moved out.
You cannot change your door lock unless the landlord has
given his consent or you have obtained an order from an arbitrator.
If an emergency occurs while the tenant is not at home and
the door cannot be opened, the landlord or emergency personnel
may remove the door by force. The tenant may be held responsible
for any costs the landlord incurs as the result of an illegal
change of locks.