A quorum of participation of the majority of the electorate is required in the following states: Bulgaria, Croatia, Italy and Malta (abrogative referendum), Lithuania, Russia and “the former Yugoslav Republic of Macedonia” (decision-making referendum). In Latvia, the quorum is half the voters who participated in the last election of Parliament (except for constitutional revisions, see below), and in Azerbaijan, it is only 25% of the registered voters. In Poland and Portugal, if the turnout is not more than 50%, the referendum is de facto consultative and nonbinding (in Portugal, the quorum is calculated on the basis of the citizens registered at the census).