Same-sex marriage in the Australian Capital Territory
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Same-sex marriage has been legal in the Australian Capital Territory (ACT), and in the rest of Australia, since 9 December 2017 following passage in the Parliament of the Marriage Amendment (Definition and Religious Freedoms) Act 2017. The ACT is unique in being the only state or territory in Australia to have independently passed a same-sex marriage law. In October 2013, the Legislative Assembly approved the Marriage Equality (Same Sex) Act 2013. The Abbott government immediately challenged the law in the High Court of Australia. The court struck down the legislation on 12 December 2013, determining that marriage is an exclusive power of the Commonwealth and no state or territory law creating any other type of marriage could operate concurrently with the Marriage Act 1961. The 31 same-sex marriages that had been performed under the ACT legislation were consequently voided.
The ACT was the first jurisdiction in Australia to legally recognise same-sex couples, following passage of the Domestic Relationships Act 1994. It was the second to allow joint adoption petitions by same-sex couples in 2004, following Western Australia. It was also the first jurisdiction to allow civil unions after its Civil Unions Act passed the Legislative Assembly in 2012.