Civil union
Switzerland

The Canton of Geneva has a law on the cantonal level, the Partenariat cantonal (the Cantonal Domestic Partnership), since 2001. It grants unmarried couples, whether same-sex or opposite-sex, many of the rights, responsibilities and protections that married couples have. However, it does not allow benefits in taxation, social security, or health insurance premiums (unlike the federal law). Geneva was the first Canton to recognise same-sex couples through this law.

On September 22, 2002, voters in the Swiss canton of Zurich voted to extend a number of marriage rights to same-sex partners, including tax, inheritance, and social security benefits. The law is limited to same-sex couples, and both partners must have lived in the canton for six months and formally commit to running a household together and supporting and aiding each another.

On November 12, 2003, the Constituent assembly of the Canton of Fribourg granted Registered Partnership as a constitutional right under the Article 14.

On January 27, 2004, the Canton of Neuchâtel voted for a law on the cantonal level, the Partenariat enregistré (the Cantonal Registered Partnership). It grants unmarried couples, whether same-sex or opposite-sex, the same rights as married couple for cantonal matters such as responsibilities and protections, benefits in taxation, social security, or health insurance premiums.

On June 5, 2005, voters extended this right to the whole of Switzerland through a federal referendum. This was the first time that the civil union laws were affirmed in a nationwide referendum in any country. The Federal Domestic Partnership Law, reserved for same-sex couples, came into force on January 1, 2007. It grants the same rights as marriage, but full joint adoption rights, facilitated naturalization and medically assisted procreation are explicitly forbidden for same-sex domestic partners.

In 2017, the Federal Councilor Simonetta Sommaruga addressed the issue that civil union is not open yet for heterosexual couples, in collaboration with experts at the University of Bern. In Geneva and Neuchâtel a type of civil union called cantonal PACS is available to opposite-sex and same-sex couples. The cantonal PACS effects are limited to cantonal law. The cantonal PACS, however, has no impact on civil status and inheritance, which are regulated by federal law.

On September 26, 2021, the people of Switzerland approved on national referendum the initiative "Marriage for all", which would grant marriage and adoption rights for same-sex couples. This initiative would be made effective on July 1, 2022.
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