The June referendum on the popular initiative "to combat the economic crisis" was a mandatory referendum, requiring a double majority; a majority of the popular vote and majority of the cantons.Nohlen & Stöver, p1891 The decision of each canton was based on the vote in that canton. Full cantons counted as one vote, whilst half cantons counted as half. The February and March referendums were "optional", whilst the September referendum was a "process initiating decision", both of which required only a majority of the public vote.
