For any UK-wide referendum to be held legislation has to be passed by the UK Parliament for each vote to take place, as there is no pre-determined format or voting franchise for any such vote. However, unlike a general election there is no legal requirement for the UK Government not to take any official position in any such vote. For example, in 1975 under the then Prime Minister Harold Wilson the Government formally recommended a "Yes" vote to staying in the European Community and in 2016 the Government formally recommended a "Remain" vote to stay in the European Union (a decision which indirectly led to the resignation of David Cameron as Prime Minister following the decision to "Leave the European Union" by the British electorate). In the 2011 referendum no official position was taken as the Conservative-Liberal Democrat coalition government was split on the issue.