Back to Country Profile
Historical Values
Year Value
1990 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1991 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1992 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1993 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1994 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1995 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1996 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1997 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1998 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
1999 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
2000 no formal, written constitution; consists of various documents, including certain acts of the UK and New Zealand Parliaments; Constitution Act 1986 was to have come into force 1 January 1987, but has not been enacted
2001 consists of a series of legal documents, including certain acts of the UK and New Zealand Parliaments and The Constitution Act 1986 which is the principal formal charter
2002 consists of a series of legal documents, including certain acts of the UK and New Zealand Parliaments and The Constitution Act 1986 which is the principal formal charter
2003 consists of a series of legal documents, including certain acts of the UK and New Zealand Parliaments and The Constitution Act 1986 which is the principal formal charter
2004 consists of a series of legal documents, including certain acts of the UK and New Zealand Parliaments and The Constitution Act 1986 which is the principal formal charter
2005 consists of a series of legal documents, including certain acts of the UK and New Zealand Parliaments, as well as The Constitution Act 1986, which is the principal formal charter; adopted 1 January 1987, effective 1 January 1987
2006 consists of a series of legal documents, including certain acts of the UK and New Zealand Parliaments, as well as The Constitution Act 1986, which is the principal formal charter; adopted 1 January 1987, effective 1 January 1987
2007 consists of a series of legal documents, including certain acts of the UK and New Zealand Parliaments, as well as The Constitution Act 1986, which is the principal formal charter; adopted 1 January 1987, effective 1 January 1987
2008 consists of a series of legal documents, including certain acts of the UK and New Zealand Parliaments, as well as The Constitution Act 1986, which is the principal formal charter; adopted 1 January 1987, effective 1 January 1987
2009 consists of a series of legal documents, including certain acts of the UK and New Zealand parliaments, as well as The Constitution Act 1986, which is the principal formal charter; adopted 1 January 1987, effective 1 January 1987
2010 consists of a series of legal documents, including certain acts of the UK and New Zealand parliaments, as well as The Constitution Act 1986, which is the principal formal charter; adopted 1 January 1987, effective 1 January 1987
2011 consists of a series of legal documents, including certain acts of the UK and New Zealand parliaments, as well as The Constitution Act 1986, which is the principal formal charter; adopted 1 January 1987, effective 1 January 1987
2012 consists of a series of legal documents, including certain acts of the UK and New Zealand parliaments, as well as The Constitution Act 1986, which is the principal formal charter; adopted 1 January 1987, effective 1 January 1987
2013 Constitution Act 1986 (the principal formal charter) adopted and effective 1 January 1987; amended 1999, 2005 (2013)
2014 Constitution Act 1986 (the principal formal charter) adopted and effective 1 January 1987; amended 1999, 2005 (2013)
2015 Constitution Act 1986 (the principal formal charter) adopted and effective 1 January 1987; amended 1999, 2005 (2013)
2016 Constitution Act 1986 (the principal formal charter) adopted and effective 1 January 1987; amended 1999, 2005, 2014 (2016)
2017 Constitution Act 1986 (the principal formal charter) adopted and effective 1 January 1987; amended 1999, 2005, 2014 (2016)
2018 history: New Zealand has no single constitution document; the Constitution Act 1986, effective 1 January 1987, includes only part of the uncodified constitution; others include a collection of statutes or "acts of Parliament," the Treaty of Waitangi, Orders in Council, letters patent, court decisions, and unwritten conventions (2018) | amendments: proposed as bills by Parliament or by referenda called either by the government or by citizens; passage of a bill as an act normally requires two sepa
2019 history: New Zealand has no single constitution document; the Constitution Act 1986, effective 1 January 1987, includes only part of the uncodified constitution; others include a collection of statutes or "acts of Parliament," the Treaty of Waitangi, Orders in Council, letters patent, court decisions, and unwritten conventions | amendments: proposed as bill by Parliament or by referendum called either by the government or by citizens; passage of a bill as an act normally requires two separate re
2020 history: New Zealand has no single constitution document; the Constitution Act 1986, effective 1 January 1987, includes only part of the uncodified constitution; others include a collection of statutes or "acts of Parliament," the Treaty of Waitangi, Orders in Council, letters patent, court decisions, and unwritten conventions | amendments: proposed as bill by Parliament or by referendum called either by the government or by citizens; passage of a bill as an act normally requires two separate re
2021 history: New Zealand has no single constitution document; the Constitution Act 1986, effective 1 January 1987, includes only part of the uncodified constitution; others include a collection of statutes or "acts of Parliament," the Treaty of Waitangi, Orders in Council, letters patent, court decisions, and unwritten conventions amendments: proposed as bill by Parliament or by referendum called either by the government or by citizens; passage of a bill as an act normally requires two separate read
2022 history: New Zealand has no single constitution document; the Constitution Act 1986, effective 1 January 1987, includes only part of the uncodified constitution; others include a collection of statutes or "acts of Parliament," the Treaty of Waitangi, Orders in Council, letters patent, court decisions, and unwritten conventions amendments: proposed as bill by Parliament or by referendum called either by the government or by citizens; passage of a bill as an act normally requires two separate read
2023 history: New Zealand has no single constitution document; the Constitution Act 1986, effective 1 January 1987, includes only part of the uncodified constitution; others include a collection of statutes or "acts of Parliament," the Treaty of Waitangi, Orders in Council, letters patent, court decisions, and unwritten conventions amendments: proposed as bill by Parliament or by referendum called either by the government or by citizens; passage of a bill as an act normally requires two separate read
2024 history: New Zealand has no single constitution document; the Constitution Act 1986, effective 1 January 1987, includes only part of the uncodified constitution; others include a collection of statutes or "acts of Parliament," the Treaty of Waitangi, Orders in Council, letters patent, court decisions, and unwritten conventions amendments: proposed as bill by Parliament or by referendum called either by the government or by citizens; passage of a bill as an act normally requires two separate read
2025 history: New Zealand has no single constitution document; the Constitution Act 1986, effective 1 January 1987, includes only part of the uncodified constitution; others include a collection of statutes or "acts of Parliament," the Treaty of Waitangi, Orders in Council, letters patent, court decisions, and unwritten conventions amendment process: proposed as bill by Parliament or by referendum called either by the government or by citizens; passage of a bill as an act normally requires two separa