From 1st January, 2012, all designers of buildings are required to provide a report on the safe design of the building and structures under Section 24 of the Work Health and Safety Act (WHS Act).
Generalising it seems the designer must ensure, so far as is reasonably practicable, that the structure is designed to be without risks to the health and safety of persons who work at or on the construction of the structure. More details are available here
The BDA will be conducting workshops to explain the implications to its members.