The law now states that each residential premises must now have at least one working smoke detector on each level of the premises. This includes all residential premises including the following: owner occupied, apartments, rental properties, any form of shared accommodation and relocatable homes.
The smoke detector must comply with AS3786 in that the occupants of buildings must be protected while they are sleeping. Depending on what class of building you have will determine where the detector is to be placed.
The duty of care for the smoke detector has been placed on the landlord, pushing the test button and replacing the battery does not constitute testing. The detector is to be tested in accordance with AS3786. Certification that the detector works under a fire situation is deemed a formal test.