No. Your obligations on existing Building Code 2013 projects don’t change once you become a code covered entity. However, you’ll be required to comply with the Code on any new projects, including private projects that you express interest in or tender for after becoming a code covered entity.
The head contractor for Commonwealth funded building work that is required to have a WRMP must have a 'fitness for work' policy as part of the WRMP. A fitness for work policy that complies with the drug and alcohol testing requirements in the Building Code 2013 will also comply with the Code.
If you’re a building contractor or other type of building industry participant that can be required to comply with the Code by section 34 of the BCIIP Act, then you become subject to the Code from the first time you submit an expression of interest (EOI) or tender (howsoever described) for Commonwealth funded building work on or after 2 December 2016. This makes you a ‘code covered entity’.