I've got in my hand a brouchure "FRESHWATER RECREATIONAL FISHING IN NSW .... Rules & Regulation Summary" now on the bottom right hand corner is written
" Some bag & size limits are currently under review & may change during the life of this publication. It is the responsibility of fishers to ensure they are operating within the law at all time"
So as you can see ..... Even in a current publication you are being warned to keep up with the latest rule changes ........ based on the wording I dont think you can expect any grace from fisheries
As for fish identification ....... If you are not sure - let it go!
Chris