On August 30, 1990, Tatarstan announced its sovereignty with the Declaration on the State Sovereignty of the Tatar Soviet Socialist Republic and in 1992 Tatarstan held a referendum on the new constitution, and 62 percent of those who took part voted in favor of the constitution. In the 1992 Tatarstan Constitution, Tatarstan is defined as a Sovereign State. However the referendum and constitution were declared unconstitutional by the Russian Constitutional Court.