What today are those who wrote a declaration of state sovereignty of the RSFR, and those who voted for it, on the consequences of decisions adopted in 1990 At the First Congress of People's Deputies of the RSFSR in the Kremlin, Moscow, May 19, 1990 On June 12, 2015, the 25th anniversary of the adoption by the Congress of People's Deputies of the RSFSR of the declaration of state sovereignty - a document that laid the foundations of the Russian Constitution.