Here is the ACCC describing Misleading & deceptive conduct.
There is a very broad provision in the Australian Consumer Law that prohibits conduct by a corporation that is misleading or deceptive, or would be likely to mislead or deceive you.
It makes no difference whether the business intended to mislead or deceive you—it is how the conduct of the business affected your thoughts and beliefs that matters.
If the overall impression left by an advertisement, promotion, quotation, statement or other representation made by a business creates a misleading impression in your mind—such as to the price, value or the quality of any goods and services—then the conduct is likely to breach the law.
The department established a fact-checking matrix purporting to allow it to reference each of the 142 claims made in the radio, television, print and mailout campaign but, when checked by the Audit Office, 52 of the references were found to fall short.
Of those 32 were in the What a Carbon Price Means for You document mailed to every household in Australia. That is 32 false claims in a 19 page document.
No doubt the government has exempted its own public communication from ACCC scrutiny.