Penalty points

I have been trying to locate a reliable reference for the definition of a ‘penalty point’ and came across this:

https://www.findlaw.com.au/articles/4270/what-on-earth-is-a-penalty-unit-and-why-is-it-a-pu.aspx

In Queensland, 1 penalty unit is the equivalent of $100, while, in New South Wales it’s $110. Finally, committing an offence in Victoria is an expensive proposition, 1 penalty unit there is worth $119.45.  

Does anyone have another reference? Couldn’t find anything on NCAT or Fair Trading websites