Конституция СССР
The electoral system of the Soviet Union was based upon Chapter XI of the Constitution of the Soviet Union and by the electoral laws enacted in conformity with it. The Constitution and laws applied to elections in all Soviets, from the Supreme Soviet of the Soviet Union, the Union republics and autonomous republics, through to regions, districts and towns. Voting was claimed to be secret and direct with universal suffrage. However, in practice, until 1989 voters could vote against candidates preselected by the Communist Party only by spoiling their ballots, whereas votes for the party candidates could be cast simply by submitting a blank ballot.