An additional eight members of the parliament are elected from the twelfth constituency. It encompasses the entire country; candidates in this constituency are elected by voters belonging to 22 recognized minorities in Croatia: the Serb minority elects three MPs, the Hungarians and Italians elect one MP each, the Czech and Slovak minorities jointly elect one MP, and all other minorities elect the final two MPs. Minority MPs are elected by simple plurality system (candidates with the most votes are elected). The nationality of the voters is listed in the voter registry, which is provided by the registrar's office that maintains Croatia's vital records. Voter nationalities are normally officially declared by the parents at birth, but any citizen may declare or change that information later on at the registrar's office at least 14 days ahead of elections (not at the polling station). The voter's nationality need not be declared or may be declared as unknown. During elections, voters who have officially declared they belong to one of the recognized minorities in Croatia may choose to vote for either a territorially applicable list or a corresponding national minority list; a voter of unknown or non-declared nationality may vote for either a territorially applicable list or any minority list; a voter who has declared a nationality other than Croat or a recognized minority may vote only for a territorially applicable list (the same as someone who has declared themselves a Croat). Minority voting and minority representation rules have raised controversy and were eventually upheld by the Constitutional Court.