Assuming you're looking at this page?
https://www.camerassavelives.vic.gov...t-certificates
I haven't looked at the regulations, but the way those pages read, it seems like an annual test is required. If it hasn't been done, you might be able to get out of it, if you really want to try that hard.
Check one fo the anti-speeding fine websites. They're full of usefull information.
Never tried myself, always just copped it and moved on.