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Historical Values
Year Value
1990 29 May 1874
1991 29 May 1874
1992 29 May 1874
1993 29 May 1874
1994 29 May 1874
1995 29 May 1874
1996 29 May 1874
1997 29 May 1874
1998 29 May 1874
1999 29 May 1874
2000 29 May 1874
2001 29 May 1874
2002 29 May 1874
2003 18 December 1998
2004 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998; adopted by referendum 18 April 1999; officially entered into force 1 January 2000
2005 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
2006 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
2007 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
2008 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
2009 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
2010 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
2011 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
2012 revision of Constitution of 1874 approved by the Federal Parliament 18 December 1998, adopted by referendum 18 April 1999, officially entered into force 1 January 2000
2013 previous 1848, 1874 (extensive revision of 1848 version); latest adopted by referendum 18 April 1999, effective 1 January 2000; amended several times, last in 2012 (2012)
2014 previous 1848, 1874 (extensive revision of 1848 version); latest adopted by referendum 18 April 1999, effective 1 January 2000; amended several times, last in 2012 (2012)
2015 previous 1848, 1874 (extensive revision of 1848 version); latest adopted by referendum 18 April 1999, effective 1 January 2000; amended several times, last in 2014 (2012)
2016 previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000; amended many times, last in 2016 (2016)
2017 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 | amendments: proposed by the two houses of the Federal Assembly or by petition of at least one million voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons; amended many times, last in 20
2018 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 (2016) | amendments: proposed by the two houses of the Federal Assembly or by petition of at least one million voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons; amended many times, las
2019 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 | amendments: proposed by the two houses of the Federal Assembly or by petition of at least one hundred thousand voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons; amended many times, l
2020 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 | amendments: proposed by the two houses of the Federal Assembly or by petition of at least one hundred thousand voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons; amended many times, l
2021 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 amendments: proposed by the two houses of the Federal Assembly or by petition of at least one hundred thousand voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons; amended many times, las
2022 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 amendments: proposed by the two houses of the Federal Assembly or by petition of at least one hundred thousand voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons; amended many times, las
2023 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 amendments: proposed by the two houses of the Federal Assembly or by petition of at least one hundred thousand voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons; amended many times, las
2024 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 amendments: proposed by the two houses of the Federal Assembly or by petition of at least one hundred thousand voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons; amended many times, las
2025 history: previous 1848, 1874; latest adopted by referendum 18 April 1999, effective 1 January 2000 amendment process: proposed by the two houses of the Federal Assembly or by petition of at least one hundred thousand voters (called the "federal popular initiative"); passage of proposals requires majority vote in a referendum; following drafting of an amendment by the Assembly, its passage requires approval by majority vote in a referendum and approval by the majority of cantons