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
31 December 1993
Philippines
2 February 1987, effective 11 February 1987
Pitcairn Islands
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 30 October 1982, 1 June 1989, 5
November 1992, 3 September 1997, 12 December 2001, and 24 July 2004
Puerto Rico
ratified 3 March 1952; approved by US Congress 3 July
1952; effective 25 July 1952