A referendum on allowing President Lukashenko to stand in further elections was held in Belarus on 17 October 2004, alongside parliamentary elections. Lukashenko was nearing the end of his constitutionally-limited two terms, and the change would allow him to run for a third term.
In accordance with article 140 of the constitution, a majority of valid votes as well as a majority of registered voters in favor of the constitutional changes were required for the result to be deemed valid
The result was 88.91% of valid votes and 79.42% of registered voters in favor, with a turnout of 90.28%.
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Text from the Wikipedia article “2004 Belarusian referendum”, available under CC BY-SA 4.0.