Panama
11 October 1972; major reforms adopted 1978, 1983, 1994, and
2004
Papua New Guinea
16 September 1975
Paraguay
promulgated 20 June 1992
Peru
31 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
25 April 1976; revised many times
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