Two referendums were held in Switzerland during 1928.Nohlen, D & Stöver, P (2010) Elections in Europe: A data handbook, p1910 The first was held on 20 May, asking voters whether they approved of amending article 44 of the constitution regarding measures against foreign infiltrators, and was approved by a majority of voters and cantons. The second was held on 2 December, asking voters whether they approved of the "Kursaalspiele" popular initiative on gambling, and was also approved.
Background The constitutional question was a mandatory referendum, which required 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 gambling question was a "popular initiative", which also required a double majority.
Results
Constitutional amendment ChoicePopular voteCantonsVotes%FullHalfTotalFor316,25070.717519.5Against131,21529.3212.5Blank votes26,688––––Invalid votes1,238––––Total475,39110019622Registered voters/turnout1,050,68345.2–––Source: Nohlen & Stöver
Gambling initiative ChoicePopular voteCantonsVotes%FullHalfTotalFor296,39551.913314.5Against274,52848.1637.5Blank votes20,248––––Invalid votes1,678––––Total592,84910019622Registered voters/turnout1,067,75455.5–––Source: Nohlen & Stöver
References