YES

Bigamy is Illegal in Australia (which is being married to more than 1-person at a time)

An application for divorce will generally take 2-months.

1- month from filing until the date of the hearing, then if the Decree Nisi is granted it becomes final 1-month and 1-day later (decree Absolute)

other than that it takes about 7- days to register for a marriage permit but there are no other time limits under the law