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 Costa Rica are fully binding on Costa Rica. LGBT activists and human rights groups celebrated the IACHR decision, while the Catholic Church and evangelical groups condemned it. The ruling met with outrage among conservative and evangelical groups, who said that the Court had disrespected Costa Rica's laws. Some opponents of the ruling called for the country to leave the jurisdiction of the Court, which would require a constitutional amendment. Constitutional amendments require a two-thirds majority in the Legislative Assembly. Several supporters of the ruling have argued that local legislation is not required to legalise same-sex marriage, citing a 2016 court decision regarding