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Historical Values
Year Value
1990 26 April 1974, effective 2 June 1974
1991 26 April 1974, effective 2 June 1974
1992 26 April 1974, effective 2 June 1974
1993 26 April 1974, effective 2 June 1974
1994 1964 constitution substantially amended on 13 December 1974
1995 1964 constitution substantially amended on 13 December 1974
1996 1964 constitution substantially amended on 13 December 1974
1997 1964 constitution substantially amended on 13 December 1974
1998 1964 constitution substantially amended on 13 December 1974
1999 1964 constitution substantially amended on 13 December 1974
2000 1964 constitution substantially amended on 13 December 1974
2001 1964 constitution substantially amended on 13 December 1974
2002 1964 constitution substantially amended on 13 December 1974 and again in 1987
2003 1964 constitution substantially amended on 13 December 1974 and again in 1987
2004 1964 constitution substantially amended on 13 December 1974 and again in 1987
2005 1964 constitution; amended many times
2006 1964 constitution; amended many times
2007 1964 constitution; amended many times
2008 1964 constitution; amended many times
2009 1964; amended many times
2010 1964; amended many times
2011 1964; amended many times
2012 1964; amended many times
2013 many previous; latest adopted 21 September 1964; amended many times, last in 2011 (2011)
2014 many previous; latest adopted 21 September 1964; amended many times, last in 2011 (2011)
2015 many previous; latest adopted 21 September 1964; amended many times, last in 2014 (2014)
2016 many previous; latest adopted 21 September 1964; amended many times, last in 2015 (2016)
2017 history: many previous; latest adopted 21 September 1964 | amendments: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of "Acts" requires majority vote by referendum, followed by final majority vote by the House and assent by the president of the republic; amended many times, last in 2016 (2017)
2018 history: many previous; latest adopted 21 September 1964 (2017) | amendments: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of "Acts" requires majority vote by referendum, followed by final majority vote by the House and assent by the president of the republic; amended many times, last in 2016 (2017)
2019 history: many previous; latest adopted 21 September 1964 | amendments: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of Acts requires majority vote by referendum, followed by final majority vote by the House and assent of the president of the republic; amended many times, last in 2016 (2017)
2020 history: many previous; latest adopted 21 September 1964 | amendments: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of Acts requires majority vote by referendum, followed by final majority vote by the House and assent of the president of the republic; amended many times, last in 2016
2021 history: many previous; latest adopted 21 September 1964 amendments: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of Acts requires majority vote by referendum, followed by final majority vote by the House and assent of the president of the republic; amended many times, last in 2020
2022 history: many previous; latest adopted 21 September 1964 amendments: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of Acts requires majority vote by referendum, followed by final majority vote by the House and assent of the president of the republic; amended many times, last in 2020
2023 history: many previous; latest adopted 21 September 1964 amendments: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of Acts requires majority vote by referendum, followed by final majority vote by the House and assent of the president of the republic; amended many times, last in 2020
2024 history: many previous; latest adopted 21 September 1964 amendments: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of Acts requires majority vote by referendum, followed by final majority vote by the House and assent of the president of the republic; amended many times, last in 2020
2025 history: many previous; latest adopted 21 September 1964 amendment process: proposals (Acts of Parliament) require at least two-thirds majority vote by the House of Representatives; passage of Acts requires majority vote by referendum, followed by final majority vote by the House and assent of the president of the republic