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Historical Values
Year Value
1990 29 December 1937; adopted 1937
1991 29 December 1937; adopted 1937
1992 29 December 1937; adopted 1937
1993 29 December 1937; adopted 1937
1994 29 December 1937; adopted 1 July 1937 by plebecite
1995 29 December 1937; adopted 1 July 1937 by plebescite
1996 29 December 1937; adopted 1 July 1937 by plebiscite
1997 29 December 1937; adopted 1 July 1937 by plebiscite
1998 29 December 1937; adopted 1 July 1937 by plebiscite
1999 29 December 1937; adopted 1 July 1937 by plebiscite
2000 29 December 1937; adopted 1 July 1937 by plebiscite
2001 29 December 1937; adopted 1 July 1937 by plebiscite
2002 29 December 1937; adopted 1 July 1937 by plebiscite
2003 29 December 1937; adopted 1 July 1937 by plebiscite
2004 29 December 1937; adopted 1 July 1937 by plebiscite
2005 adopted 1 July 1937 by plebiscite; effective 29 December 1937
2006 adopted 1 July 1937 by plebiscite; effective 29 December 1937
2007 adopted 1 July 1937 by plebiscite; effective 29 December 1937
2008 adopted 1 July 1937 by plebiscite; effective 29 December 1937
2009 adopted 1 July 1937 by plebiscite; effective 29 December 1937
2010 adopted 1 July 1937 by plebiscite; effective 29 December 1937
2011 adopted 1 July 1937 by plebiscite; effective 29 December 1937
2012 adopted 1 July 1937 by plebiscite; effective 29 December 1937
2013 previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937; amended many times, last in 2012 (2012)
2014 previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937; amended many times, last in 2013 (2013)
2015 previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937; amended many times, last in 2015 (2015)
2016 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 | amendments: proposed as bills in Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidental signature; amended many times, last in 2015 (2016)
2017 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 | amendments: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature; amended many times, last in 2015 (2016)
2018 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 (2018) | amendments: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature; amended many times, last in 2018 (2018)
2019 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 | amendments: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature; amended many times, last in 2019 (2019)
2020 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 | amendments: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature; amended many times, last in 2019
2021 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 amendments: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature; amended many times, last in 2019
2022 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 amendments: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature; amended many times, last in 2019
2023 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 amendments: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature; amended many times, last in 2019
2024 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 amendments: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature; amended many times, last in 2019
2025 history: previous 1922; latest drafted 14 June 1937, adopted by plebiscite 1 July 1937, effective 29 December 1937 amendment process: proposed as bills by Parliament; passage requires majority vote by both the Senate and House of Representatives, majority vote in a referendum, and presidential signature