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
The Pitcairn Constitution Order 2010, effective 4
March 2010
Poland
adopted by the National Assembly 2 April 1997; passed by
national referendum 25 May 1997; effective 17 October 1997
Portugal
adopted 2 April 1976; subsequently revised
note: the revisions placed the military under strict civilian
control, trimmed the powers of the president, and laid the
groundwork for a stable, pluralistic liberal democracy; they allowed
for the privatization of nationalized firms and government-owned
communications media
Puerto Rico
ratified 3 March 1952; approved by US Congress 3 July
1952; effective 25 July 1952
Qatar
ratified by public referendum on 29 April 2003, endorsed by
the Amir on 8 June 2004, effective on 9 June 2005
Romania
8 December 1991; revised 29 October 2003