Muslim community, even though bigamy is an offence. All marriages that happen within the United Kingdom must be monogamous and meet the requirements of the relevant legislation to be perceived as legitimately substantial. For polygamous unions in the UK to be viewed as valid, the people must live in a country where a person is allowed to have more than one spouse and get married in a nation that permits it. There is evidence of unregistered polygamous marriages in the UK, performed through religious ceremonies, that are not recognized under UK law. In May 2016, a cross-bench member of the British House of Lords Baroness Cox introduced the Arbitration and Mediation Services (Equality) Bill. This Bill would ensure that individuals in polygamous marriages and religiously recognized marriages not considered legal in the UK are informed that they could be without legal protection if they were caught by authorities. The Americas Chile Polygyny has a long history among the Mapuche people of southern South America. Wives that share the same husband are often relatives, such as sisters, who live in the same community. Having the same husband does not imply women belong to the same household. Mapuche polygamy has no legal recognition in Chile. This puts women who are not legally married to their husband at disadvantage to any legal wife in terms of securing inheritance. It is thought that present-day polygamy is much less common than it once was, in particularly compared with the time before the Occupation of Araucanía (1861–1883) when Araucanía lost its autonomy. Albeit chiefly rural, Mapuche polygamy has also been reported in the low-income peripheral communes of Santiago. North America Polygyny is illegal in the United States and Canada. Mormon fundamentalism believes in the validity of selected fundamental aspects of Mormonism as taught and practiced in the nineteenth century. Fundamentalist Latter-Day Saints' teachings include plural marriage, a form of polygyny first taught by Joseph Smith, the founder of the Latter Day Saint movement. In the 21st century, several sources have claimed as many as 60,000 fundamentalist Latter-day Saints in the United States, with fewer than half of them living in polygamous households. Others have suggested that there may be as few as 20,000 Mormon fundamentalists with only 8,000 to 15,000 practicing polygamy. The largest Mormon fundamentalist groups are the Fundamentalist Church of Jesus Christ of Latter Day Saints (FLDS Church) and the Apostolic United Brethren (AUB).