Australia Model Code of Practice: Construction Work 2.1a: 2.1 Designers give the commissioning PCBU a written safety report on design-specific construction hazards (r 295)

A designer of a structure or part of one to be constructed must give the PCBU that commissioned the design a written report specifying, so far as the designer is reasonably aware, the hazards relating to the design that create a risk to people who will carry out construction work on it and that are specific to that design (WHS Regulations r 295). Several designers may share this duty (draftspersons, building designers, architects, engineers), and a builder who designs or alters a design, even after work starts, becomes a designer. On request, the designer can give anyone issued with the design information on how it was designed to be without risk through its life cycle. Appendix D explains when a report is needed: for unusual or atypical features (a steel frame that must be erected in sequence, subfloor ventilation on methane-prone landfill, an extra storey on an existing one, an unusually steep roof pitch, pre-stressed slabs), not for typical designs with only typical risks; for homes, when the person commissioning is a PCBU.