The definition describes a residential building for the accommodation of the aged. These buildings are the homes of the residents. To be an aged care building the residents must be provided with personal care services and 24 hour assistance to evacuate.
In reference to the Australian BCA; the definition applies to Class 9c aged care buildings. If a building does not satisfy the definition, then for BCA purposes it is not an aged care building and cannot be constructed as one. Such a building would potentially be an ordinary Class 3 or 9a building and would need to comply with the relevant provisions. The BCA contains a number of specific provisions for Class 9c aged care buildings.