An enactment that authorises an advisory referendum (which does not trigger a legislative change or bind the government to do something) becomes spent once the referendum has taken place. Hence the Referendum Act 1975 became spent after the 1975 United Kingdom European Communities membership referendum took place, and was subsequently repealed by the Statute Law (Repeals) Act 1986. Likewise the parts of the European Union Referendum Act 2015 that authorised the 2016 EU membership referendum and regulated its execution are now spent. However, this Act also contains provisions regulating funding of and expenditure by political campaign groups under the framework of the Political Parties, Elections and Referendums Act 2000, which has the potential to lead to criminal convictions under the 2000 Act, and as such those provisions continue to be relevant until such time as Parliament decides no more such offences will be discovered or prosecuted.