To be eligible for partner migration to Australia, you must meet the following basic requirements:
You must be in a married or a de facto relationship with an Australian citizen, Australian permanent resident or eligible NZ citizen. You can apply from within or outside Australia.
If you are living overseas and are engaged to be married to an Australian citizen, permanent resident or eligible NZ citizen and intend to marry that person before entering Australia, you can apply for a spouse visa but you must marry that person before a spouse visa can be granted.
You must be able to prove to the Australian Department of Immigration and Multicultural and Indigenous Affairs (DIMIA) that your relationship is genuine and continuing.
You must be living outside Australia and be engaged to be married to an Australian citizen, permanent resident or eligible NZ citizen, and wish to marry that person in Australia. You cannot apply for a fiancé visa if you are in Australia.
You must be able to prove to DIMIA that you genuinely intend to marry your fiancé and live together as spouses.
You must be in an interdependent relationship with an Australian citizen, permanent resident or eligible NZ citizen. Interdependent relationships include, but are not restricted to, same sex couples.
You can apply outside Australia or in Australia. Like the categories above, you must be able to prove to DIMIA that your relationship is genuine and continuing.