FYI I'm only from SA which is why I've got no idea about this stuff.....
Say no more
I think compliance plates didn't come in until 77 so you should be okay there but I think you will need to have the lights working properly.
You will also need a horn and mirror.
You will most likely find that different clubs will behave differently as to actual requirements and some may even require a roadworthy.
Best you suss out any clubs as to how they will look upon the bike before you join them.
Road going clubs will most probably want a RWC.
You can always give Drakie a yell as he is VERi's red plate officer but I don't think we can do bikes for other states.