A constitutional referendum was held in São Tomé and Príncipe on 22 August 1990. The new constitution would introduce multi-party democracy for the first time since independence, as well as limiting the President to two terms.Elections in São Tomé and Príncipe African Elections Database It was approved by 95% of voters.Dieter Nohlen, Michael Krennerich & Bernhard Thibaut (1999) Elections in Africa: A data handbook, p745 Parliamentary and presidential elections were held the following year.
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