9 November 1990; note - a new interim constitution was
promulgated in January 2007; the November 2006 peace agreement calls
for the election of a Constituent Assembly to draft a new permanent
constitution

Netherlands
adopted 1815; amended many times, most recently in 2002

Netherlands Antilles
29 December 1954, Statute of the Realm of the
Netherlands, as amended

New Caledonia
4 October 1958 (French Constitution)

New Zealand
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

Nicaragua
9 January 1987; reforms in 1995, 2000, and 2005

Niger
new constitution adopted 18 July 1999

Nigeria
new constitution adopted 5 May 1999; effective 29 May 1999

Niue
19 October 1974 (Niue Constitution Act)

Norfolk Island
Norfolk Island Act of 1979, as amended in 2005

Northern Mariana Islands
Constitution of the Commonwealth of the
Northern Mariana Islands effective 1 January 1978; Covenant
Agreement fully effective 4 November 1986

Norway
17 May 1814; amended many times

Oman
none; note - on 6 November 1996, Sultan QABOOS issued a royal
decree promulgating a basic law considered by the government to be a
constitution which, among other things, clarifies the royal
succession, provides for a prime minister, bars ministers from
holding interests in companies doing business with the government,
establishes a bicameral legislature, and guarantees basic civil
liberties for Omani citizens

Pakistan
12 April 1973; suspended 5 July 1977, restored 30 December
1985; suspended 15 October 1999, restored in stages in 2002; amended
31 December 2003; suspended 3 November 2007; restored on 15 December
2007

Palau
1 January 1981

Panama
11 October 1972; major reforms adopted 1978, 1983, 1994, and
2004

Papua New Guinea
16 September 1975

Paraguay
promulgated 20 June 1992

Peru
29 December 1993

Philippines
2 February 1987, effective 11 February 1987

Pitcairn Islands
30 November 1838; reformed 1904 with additional
reforms in 1940; further refined by the Local Government Ordinance
of 1964

Poland
adopted by the National Assembly 2 April 1997; passed by
national referendum 25 May 1997; effective 17 October 1997

Portugal
adopted 2 April 19