My understanding has always been Adults in Australia are required by law to have your name on the Electoral role and to not do so is a criminal offence which could land you in trouble.
And I believe this was the position of the WT in giving to Caesar what belongs to Caesar obeying the law of the land however voting for another Government was when you obeyed God as ruler and not men.
"You can`t serve two masters"
So long as your name is on the Electoral role and as a JW you refuse to vote because of your religious beliefs you were never fined it is a legitimate reason for not voting.
For over 33 years as a JW I never voted and gave my reasons for not doing so and was never prosecuted.