In 2013 it was announced that there were now minimum security requirements for rental properties and lessors have until the 1 July 2015 to comply
To summarise please read note the following:
Front main door must have a deadlock or a key lockable security screen. If the door does not have a security screen it must also have a peep hole or side light to ensure that a tenant can see who is at their front door safely without opening the door.
Windows need to be fitted with a lock but not necessarily a key lock to prevent the window being opened fro the outside. This is not applicable for windows that are not on the ground floor.
External Lighting – There needs to be an electrical light at the main entry door that can be operated from the internal of the property.
If you require any further information or clarification on the above it would be a good idea to visit the Department of Commerce Consumer Protection
http://www1.safetyline.wa.gov.au/sites/default/files/atoms/files/minimumsecurityrta.pdf