During this time, the discovery of oil in the North Sea and the following "It's Scotland's oil" campaign of the Scottish National Party (SNP) resulted in rising support for Scottish independence, as well as the SNP. The party argued that the revenues from the oil were not benefitting Scotland as much as they should. The combined effect of these events led to Prime Minister Wilson committing his government to some form of devolved legislature in 1974. Under the terms of the Scotland Act 1978, an elected assembly would be set up in Edinburgh if the public approved it in a referendum be held on 1 March 1979. A narrow majority of 51.6% to 48.4% voted in favour of a Scottish Assembly, but the Act also required that at least 40% of the total electorate vote in favour of the proposal. As the turnout was only 63.6%, the vote in favour represented only 32.9% of the eligible voting population, and the Assembly was not established.