In contrast, 34 countries (as of 2021) have definitions of marriage in their constitutions that prevent marriage between couples of the same sex, most enacted in recent decades as a preventative measure. Adoption rights are not necessarily covered, though most states with same-sex marriage allow those couples to jointly adopt. As of 2022, marriage between same-sex couples is legally performed and recognized in 30 countries (nationwide or in some jurisdictions) with the most recent being Chile on 10 March 2022 and Switzerland starting 1 July 2022. Same-sex marriage, also known as gay marriage, is the marriage of two people of the same sex or gender. Two men marry, surrounded by wedding party, in New Orleans, United States on 11 November 2017 Foreign same-sex spouses are eligible for a "Non-Tourist Visa" as a dependent.Some cities and prefectures issue certificates for same-sex couples, but they are not legally binding.Unregistered cohabitation or Maitri Karar–type contractual relationships.Legal guardianships (nationwide, except Hong Kong and Macau), residency rights for foreign spouses of legal residents (Hong Kong).Romania ruling of the European Court of Justice obliges the state to provide residency rights for the foreign spouses of EU citizens. Registered foreign marriages confer limited rights. Neither performed nor recognized in American Samoa or some tribal nations.Neither performed nor recognized in six British Overseas Territories.Neither performed nor recognized in Niue, Tokelau, or the Cook Islands.Registered in Aruba, Curaçao and Sint Maarten in such cases, but the rights of marriage are not guaranteed. Performed in the Netherlands proper, including the Caribbean Netherlands.Performed statewide in 26 of 31 states and in Mexico City, in certain municipalities in one other state, and recognized by all states in such cases.