You must be in a genuine relationship with your spouse or de facto partner who is:
You pay for the temporary and the permanent visa at the same time
This visa permits the Spouse or defacto Partner of an Australian Permanent resident, Australian Citizen or Eligible New Zealand Live in Australia Temporarily.
Getting this visa is the first step towards a permanent Partner visa (subclass 100).
To be eligible for 309 visa ,one must be
100 subclass for Permanent Visa :
Remember - To get the permanent Partner visa (subclass 100), you must hold this subclass 309 visa. If you are granted any other visa, the new visa will replace your subclass 309 visa. This means you can't be granted a permanent Partner visa (subclass 100).