U.S. signs same sex marriage into federal law A new law requires the U.S. federal government to recognise all marriages, including same-sex and interracial unions, preventing the conservative- led Supreme Court from overturning previous rulings SAME-SEX MARRIAGE LEGALISED Iceland Norway Switzerland UK Austria Belgium Denmark France Finland Germany Ireland Luxembourg Malta Netherlands Portugal Slovenia Spain Sweden Canada United States Mexico Costa Rica Colombia Ecuador Brazil Uruguay Chile Argentina South Africa Australia New Zealand Taiwan 2018 Inter-American Court of Human Rights: Issued advisory opinion that OAS members must legalise same-sex marriage 2018 European Court of Justice: All EU countries required to recognise same sex marriage for purposes of immigration Source: Human Rights Campaign © GRAPHIC NEWS