The Commonwealth Marriage Act 1961 currently only allows marriage between a man and a woman.
The survey being conducted by the Australia Bureau of Statistics (ABS) asks one question:
should the law be changed to allow same-sex couples to marry?
The Postal Survey will close on Tuesday 7 November 2017 and survey results will be published on Wednesday 15 November on the ABS website.
Depending on the outcome of the Postal Survey, the Australian Parliament may (or may not) decide to amend the law to allow two people to marry, regardless of their sex.
If the Parliament approves such an amendment, same-sex couples wishing to get married will need to wait until the new law comes into force before lodging their Notice of Intent to Marry.