Samoa
1 January 1962
San Marino
8 October 1600; electoral law of 1926 serves some of the
functions of a constitution
Sao Tome and Principe
approved March 1990; effective 10 September
1990
Saudi Arabia
governed according to Shari'a (Islamic law); the Basic
Law that articulates the government's rights and responsibilities
was introduced in 1993
Senegal
a new constitution was adopted 7 January 2001
Serbia and Montenegro
4 February 2003
Seychelles
18 June 1993
Sierra Leone
1 October 1991; subsequently amended several times
Singapore
3 June 1959, amended 1965 (based on preindependence State
of Singapore Constitution)
Slovakia
ratified 1 September 1992, fully effective 1 January 1993;
changed in September 1998 to allow direct election of the president;
amended February 2001 to allow Slovakia to apply for NATO and EU
membership