In the Dutch Intelligence and Security Services Act referendum, 2018, preliminary results indicateresults indicate 47.3% of votes in favour and 48.8% of votes in opposition, with the remaining votes blank and a turnout of 51.4%. The referendum is valid in recommending to overturn the law if turnout exceeds 30% and a majority votes in opposition. How is this majority counted? Does it need to be >50%, or is exceeding the votes in favour sufficient?