Same-sex marriage 2010 upon promulgation by the Argentine President. Argentina thus became the first country in Latin America, the second in the Americas, and the tenth in the world to legalize same-sex marriage. Australia became the second nation in Oceania to legalise same-sex marriage when the Australian Parliament passed a bill on 7 December 2017. The bill received royal assent on 8 December, and took effect on 9 December 2017. The law removed the ban on same-sex marriage which previously existed and followed a voluntary postal survey held from 12 September to 7 November 2017, which returned a 61.6% "Yes" vote for
Same-sex marriage in Austria was rejected by Parliament, with only NEOS supporting the Greens' proposal. On 12 October 2017, the Constitutional Court agreed to consider one of the cases challenging the law barring same-sex marriage. On 4 December 2017, the Constitutional Court struck down the ban on same-sex marriage as unconstitutional. Same-sex marriage will become legal on 1 January 2019, unless the Parliament changes the law sooner. The ruling also allowed the couples involved in the challenge to marry immediately. On 6 December, the SPÖ, which introduced a bill to legalise same-sex marriage on 9 November 2017, said it would continue to push for