They are having a referendum on liberalisig the abortion law today. Last time (in 1998) they didn’t get a big enough turnout for the Yes vote to be valid, but this time around the Portuguese government have said that as long as there is a majority in favour (which the polls suggest will be the case) the liberalisation will go ahead regardless of whether the absolute number of poeple voting in favour is big enough to count as a valid referendum result.